Add script to fix names

[dominikl]

Adds script to fix names (for example dataset names). I originally had that in the idr0151 repository, because I'll need it there. Submitter wants dataset names like 01: wild-type - Dichaete antibody stain (1) but in the annotations he actually put 01_wild-type_Dichaete antibody stain (1) as dataset name. This might be useful for other submissions as well. I'm sure I've done similar things over and over again in the past.

[will-moore]

I had a look at the code and I think I have an idea what it's doing, but if you could add some test instructions / files to create etc that would be handy, thx

[dominikl]

Added an example for fixing organism names. To run: python fix_names.py ../test/fix_names_test_correct.txt ../test/fix_names_test.txt "^.+,.+,(?P<name>.+),"