Fixed a bug that made a +1 or -1 intron position result in a frame shift.

Mutator.py:
- In the newSplice() function, The call to shiftpos() is changed back to the
  original one. This version (shiftpos(i + 1) - 1) was done to make an
  insertion at the end of an exon possible. So this functionality is not
  available right now.


git-svn-id: https://humgenprojects.lumc.nl/svn/mutalyzer/trunk@80 eb6bd6ab-9ccd-42b9-aceb-e2899b4a52f1