remove dead loop
pep8: variable names, re #49

I didn't change the variables in the offset block.
That one will be killed in isrcsubmit2 anyways.
pep8: function names, re #49
pep8: print function names, re #49
pep8: fix some (not all) methods names, close #49

Some classes will be used in isrcsubmit2 and I did change
the function names in some.
However, some classes are near direct wrappers for
python-musicbrainz2 classes or use these functions/methods.
I didn't change the style for these to be consistent.

The code is still far from pep8 "compliant",
but a step in the right direction.