[build] sped up the build considerable.

We used to use the mango SPI processor, but this had two major issues:
* ecj wouldn't run annotation processors, requiring a separate proc:only compile run with javac
* mangoSPI couldn't do incremental compilation, so this required a full rebuild just to generate SPI files, every time.

Addressed by updating to IPP40 which does support explicit annotation processors even for ecj, and
adding our own SPI generating annotation processor to the build which can deal with incrementals.

There are some limits; removing a `@Provides` annotation on an existing type will need a full clean to pick that up, for example.
These limits seem quite exotic, though.

93 files changed, 907 insertions, 338 deletions

diff --git a/src/core/lombok/bytecode/PoolConstantsApp.java b/src/core/lombok/bytecode/PoolConstantsApp.java
index c2120cc0..65b51f17 100644
--- a/src/core/lombok/bytecode/PoolConstantsApp.java
+++ b/src/core/lombok/bytecode/PoolConstantsApp.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2012 The Project Lombok Authors.
+ * Copyright (C) 2012-2021 The Project Lombok Authors.
  * 
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -26,8 +26,7 @@ import java.util.ArrayList;
 import java.util.List;
 
 import lombok.core.LombokApp;
-
-import org.mangosdk.spi.ProviderFor;
+import lombok.spi.Provides;
 
 import com.zwitserloot.cmdreader.CmdReader;
 import com.zwitserloot.cmdreader.Description;
@@ -36,9 +35,8 @@ import com.zwitserloot.cmdreader.Mandatory;
 import com.zwitserloot.cmdreader.Sequential;
 import com.zwitserloot.cmdreader.Shorthand;
 
-@ProviderFor(LombokApp.class)
+@Provides
 public class PoolConstantsApp extends LombokApp {
-	
 	@Override public String getAppName() {
 		return "Xprintpool";
 	}
diff --git a/src/core/lombok/bytecode/PostCompilerApp.java b/src/core/lombok/bytecode/PostCompilerApp.java
index 5f49bd81..7f2237c0 100644
--- a/src/core/lombok/bytecode/PostCompilerApp.java
+++ b/src/core/lombok/bytecode/PostCompilerApp.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2010 The Project Lombok Authors.
+ * Copyright (C) 2010-2021 The Project Lombok Authors.
  * 
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -33,8 +33,7 @@ import java.util.List;
 import lombok.core.DiagnosticsReceiver;
 import lombok.core.LombokApp;
 import lombok.core.PostCompiler;
-
-import org.mangosdk.spi.ProviderFor;
+import lombok.spi.Provides;
 
 import com.zwitserloot.cmdreader.CmdReader;
 import com.zwitserloot.cmdreader.Description;
@@ -43,7 +42,7 @@ import com.zwitserloot.cmdreader.Mandatory;
 import com.zwitserloot.cmdreader.Sequential;
 import com.zwitserloot.cmdreader.Shorthand;
 
-@ProviderFor(LombokApp.class)
+@Provides
 public class PostCompilerApp extends LombokApp {
 	@Override public List<String> getAppAliases() {
 		return Arrays.asList("post", "postcompile");
diff --git a/src/core/lombok/bytecode/PreventNullAnalysisRemover.java b/src/core/lombok/bytecode/PreventNullAnalysisRemover.java
index 20572e22..14e95c46 100644
--- a/src/core/lombok/bytecode/PreventNullAnalysisRemover.java
+++ b/src/core/lombok/bytecode/PreventNullAnalysisRemover.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2010-2014 The Project Lombok Authors.
+ * Copyright (C) 2010-2021 The Project Lombok Authors.
  * 
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -27,15 +27,15 @@ import java.util.concurrent.atomic.AtomicBoolean;
 
 import lombok.core.DiagnosticsReceiver;
 import lombok.core.PostCompilerTransformation;
+import lombok.spi.Provides;
 
-import org.mangosdk.spi.ProviderFor;
 import org.objectweb.asm.ClassReader;
 import org.objectweb.asm.ClassVisitor;
 import org.objectweb.asm.ClassWriter;
 import org.objectweb.asm.MethodVisitor;
 import org.objectweb.asm.Opcodes;
 
-@ProviderFor(PostCompilerTransformation.class)
+@Provides
 public class PreventNullAnalysisRemover implements PostCompilerTransformation {
 	
 	@Override public byte[] applyTransformations(byte[] original, String fileName, DiagnosticsReceiver diagnostics) {
diff --git a/src/core/lombok/bytecode/SneakyThrowsRemover.java b/src/core/lombok/bytecode/SneakyThrowsRemover.java
index 037cb109..7ed3f80f 100644
--- a/src/core/lombok/bytecode/SneakyThrowsRemover.java
+++ b/src/core/lombok/bytecode/SneakyThrowsRemover.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2010-2014 The Project Lombok Authors.
+ * Copyright (C) 2010-2021 The Project Lombok Authors.
  * 
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -27,8 +27,8 @@ import java.util.concurrent.atomic.AtomicBoolean;
 
 import lombok.core.DiagnosticsReceiver;
 import lombok.core.PostCompilerTransformation;
+import lombok.spi.Provides;
 
-import org.mangosdk.spi.ProviderFor;
 import org.objectweb.asm.ClassReader;
 import org.objectweb.asm.ClassVisitor;
 import org.objectweb.asm.ClassWriter;
@@ -37,7 +37,7 @@ import org.objectweb.asm.Label;
 import org.objectweb.asm.MethodVisitor;
 import org.objectweb.asm.Opcodes;
 
-@ProviderFor(PostCompilerTransformation.class)
+@Provides
 public class SneakyThrowsRemover implements PostCompilerTransformation {
 	
 	@Override public byte[] applyTransformations(byte[] original, String fileName, final DiagnosticsReceiver diagnostics) {
diff --git a/src/core/lombok/core/Main.java b/src/core/lombok/core/Main.java
index 47afaefd..2c9d1dcb 100644
--- a/src/core/lombok/core/Main.java
+++ b/src/core/lombok/core/Main.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2009-2018 The Project Lombok Authors.
+ * Copyright (C) 2009-2021 The Project Lombok Authors.
  * 
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -30,7 +30,7 @@ import java.util.Collection;
 import java.util.Collections;
 import java.util.List;
 
-import org.mangosdk.spi.ProviderFor;
+import lombok.spi.Provides;
 
 public class Main {
 	private static final Collection<?> HELP_SWITCHES = Collections.unmodifiableList(Arrays.asList(
@@ -46,7 +46,7 @@ public class Main {
 		}
 	}
 	
-	@ProviderFor(LombokApp.class)
+	@Provides
 	public static class VersionApp extends LombokApp {
 		@Override public String getAppName() {
 			return "version";
@@ -66,7 +66,7 @@ public class Main {
 		}
 	}
 	
-	@ProviderFor(LombokApp.class)
+	@Provides
 	public static class LicenseApp extends LombokApp {
 		@Override public String getAppName() {
 			return "license";
diff --git a/src/core/lombok/core/PublicApiCreatorApp.java b/src/core/lombok/core/PublicApiCreatorApp.java
index c1430c24..f45808fe 100644
--- a/src/core/lombok/core/PublicApiCreatorApp.java
+++ b/src/core/lombok/core/PublicApiCreatorApp.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2012 The Project Lombok Authors.
+ * Copyright (C) 2012-2021 The Project Lombok Authors.
  * 
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -36,10 +36,9 @@ import java.util.zip.ZipEntry;
 
 import lombok.Lombok;
 import lombok.patcher.ClassRootFinder;
+import lombok.spi.Provides;
 
-import org.mangosdk.spi.ProviderFor;
-
-@ProviderFor(LombokApp.class)
+@Provides
 public class PublicApiCreatorApp extends LombokApp {
 	@Override public String getAppName() {
 		return "publicApi";
diff --git a/src/core/lombok/core/configuration/ConfigurationApp.java b/src/core/lombok/core/configuration/ConfigurationApp.java
index 9c225fdb..8d794c8a 100644
--- a/src/core/lombok/core/configuration/ConfigurationApp.java
+++ b/src/core/lombok/core/configuration/ConfigurationApp.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2014-2020 The Project Lombok Authors.
+ * Copyright (C) 2014-2021 The Project Lombok Authors.
  * 
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -41,8 +41,6 @@ import java.util.Set;
 import java.util.TreeMap;
 import java.util.TreeSet;
 
-import org.mangosdk.spi.ProviderFor;
-
 import com.zwitserloot.cmdreader.CmdReader;
 import com.zwitserloot.cmdreader.Description;
 import com.zwitserloot.cmdreader.Excludes;
@