Add OPML extension to the list of file types
Added default quota option
Added quota_usage parameter for options
Change license to AGPL
Set quota usage for options imported from a file
Kohana 3.3 upgrade
Merge branch 'quotas-dev'
Flattened channel options.

* Channel to channel option mapping is now one to one.
* Added a format event hook to provide a friendly display name of the channel which in this case is the feed's title.
Remove crawling

* The plugin only provides the UI for adding RSS
channels. Crawling is handled by an external application
which then submits the data for posting to the API