Solution by Ruben Westerberg

ch-1.pl and ch-1.p6
===
Run with a single argument. Argument is the number of terms to add in calculating Eulers number. If no argument is given, a default of 10 terms are used.

ch-2.pl and ch-2.p6
===
Run with a single argument. Argument is a URI which is normalized (no semantic changes). If no argument is given a test URI is used.
- Normalizes scheme to lower case
- Normalize % codes to upper case
- decode unreserved % codes if present
- encode any characters outside of reserved or unreserved codes.