New script: fixsrc.py that fixes trivial errors in the sources

The script is supposed ot target errors pointed out by the Krazy
source checker at englishbreakfastnetwork.org. It is potentially
useful in all of KDE and not just in Calligra.

This first version does:
- add newlines to files that don't end in it.

FEATURE: Tool to automatically fix trivial errors in source files
DIGEST: New tool to automatically fix trivial errors in source files