PEP8 Conformance (1/2)

Okay, PEP8, you win, no more tabs for me. :(
PEP8 Conformance (2/2)

Fixing up the other non-tab-related stuff.
editplaycount: A bit of cleanup.
editplaycount: Now supports multiple songs.

I like how I basically un-did the last commit. ;)
Updated the documentation.