Save the timestamp when units are added or removed from a repo
Add XML metadata writer
Update to remove original file when fastforwarding xml files
Fix Unit tests
Move test for START_DOCUMENT event to the last item checked since it is the least frequent
Merge branch 'master' into barnabycourt-repo-association-timestamps
Use TZ aware UTC for last delete time
Add UTC TZ info to datetimes extracted from Mongo
Fix unit test regressions
Update to skip dom parsing since it takes too long (16 minutes vs 30 seconds for large files)
Update for PR comments
Update for python 2.6 not supporting context handlers on gzip files
Fix test case to not use context for gzip file
Fix test case to not use context for gzip file
Merge branch 'master' into barnabycourt-repo-association-timestamps

Conflicts:
	server/pulp/server/managers/repo/unit_association.py
Fix unittest error imported from master