The latest eclipse version properly splits the jdt.core module and the
compiler. To load jdt.core classes during compilation the compiler SCL
needs a reference to the jdt.core SCL.

* Update copyright headers
* Update code style (tabs, not spaces, spaces around + operator - that's about it)
* Use `x.class.getResourceAsStream`, not `x.getClass().` - minor mostly irrelevant nit.
* Rename and re-locate the jar itself.
* 'ecj' as an alias for this command seems a bit too cavalier' removed it.
* The source is in its own 'root' src dir, it doesn't really fit in the eclipse agent sources - it's more a maven agent.
* Fixed a bug where a filehandle wasn't safe closed. Mostly irrelevant (JVM would quite afterwards anyway).
* Slight rewording of the ecj docs.

* Adds AgentBootstrap, the actual bootstrapping agent
* Adds MavenEcjBootstrapApp, the command line app for generating the
appropriate files
* Updates the build to package these correctly
* Updates the documentation for setup/ecj