Added info messages for corrected roll rule on splice sites.

src/Mutalyzer.py:
- Output info message in case of a roll that was rolled back because it
  crossed exon boundaries.

src/Modules/Output.py:
- Fix: output messages from (and including) the level specified in the
  configuration.



git-svn-id: https://humgenprojects.lumc.nl/svn/mutalyzer/trunk@194 eb6bd6ab-9ccd-42b9-aceb-e2899b4a52f1