Revert commit r195.

This commmit brings in some bugs that take some time to fix. It will be
recommited in a new branch 'exon-deletions-branch' in a few moments.



git-svn-id: https://humgenprojects.lumc.nl/svn/mutalyzer/trunk@197 eb6bd6ab-9ccd-42b9-aceb-e2899b4a52f1