#472 - Add large image preview which doesn't upscale if it's smaller than 2000px.
#472 Cleaned up image scaling in the preview processor a bit.
Merge branch 'issue-472' of git://github.com/simong/Hilary into issue-472
#500 - Fleshes out the Etherpad section in the README
#500 - Passing the user's language on to Etherpad

The language is retrieved from the locale in the User object on the context.
This is then passed in the query string to the ep_oae Etherpad plugin.
The plugin will set it in a `language` cookie so it can be picked up
by Etherpad's i18n framework.
#500 - Not creating an activity if no text has been editted on publish.

We're now no longer generating an activity when a collabdoc gets published
that has no actual changes.

The etherpad properties (padId and groupId) are now also returned when
the collabdoc gets created.
Merged sakaiproject/master into simong/issue-500-etherpad-issues.
Merge branch 'issue-500-etherpad-issues' of git://github.com/simong/Hilary into issue-500-etherpad-issues
Updating README
README fix