Add goal and credits to README.
Add asaf and daniel to the license.
Ignore *.swp and *.pyc files.
Add a variant of KTH's algorithm.

The current algorithm works well (even better than KTH's original algorithm)
on SIM and SIM+ datasets with the parameters specified in the supplementary
notes of ISBI's paper:
http://bioinformatics.oxfordjournals.org/content/early/2014/03/04/bioinformatics.btu080/suppl/DC1