Try to handle whole-exon deletion and exon-fusion.

src/Modules/Mutator.py:
- Added method (add_removed_sites) to give splice sites that should be
  ignored. Now newSplice() does not process these splice sites.

src/Mutalyzer.py:
- Handle whole-exon deletions and exon-fusions by removing splice sites
  where we can. A notice is printed in this case. Otherwise, if splice
  sites are hit in some other way, no protein product is predicted. This
  fixes Trac issues #35 and #36.



git-svn-id: https://humgenprojects.lumc.nl/svn/mutalyzer/trunk@195 eb6bd6ab-9ccd-42b9-aceb-e2899b4a52f1