Merge pull request #66 from infirit/master

Remove unneeded files plus various cleanup/fixes
As of 5804817, the call to generate_pixmap():2353 was changed to pass by
reference. This broke the GTK2 implementation of generate_pixmap().

This commit updates the GTK2 function to work with the changes.
Fix typo in function name
Merge pull request #67 from ryandoyle/master

Regression fix and typo
Use GTK_API_VERSION in pkgconfig in file