Change to use feedparser instead of atom.core. Fix some lint warnings.
Reworked A LOT of the google bug importer to use successive CSVs (issue871)

There are still a few broken thing in this commit (including some previous tests).
However, this is really more of a WIP commit.
Adding back the older bug url logic. Removing deprecated tests (issue871)
Removed unused test data (issue871)
Remove gdata dependency from install reqs
Merge branch 'master' into issue871