Merge pull request #59 from DeOb/master

Database cleanup and plugin configuration.
Fixes #28 and fixes #61
Optimized DS cleanup queries.
Garfield plugin fix
Optimized datastore cleanup cron.
Changed the number of items returned in the RSS feed. We may need to optimize this further.
Merge pull request #64 from jbreitbart/master

Various fixes
Some cleanup and changed JSON handling.
Added unsupported exception.
Cleanup. Added basic JSON output.
Merge pull request #67 from jbreitbart/master

Cleanup
Add imgur plugin