Add some more information to the activity arrays
Fix cloud/activity OCS API link
Revert "Don't use global links anymore (we link the file names instead)"

This reverts commit 6ed673c20f0ab26d119e05c1eb1075f6a5102b92.

Conflicts:
	lib/hooks.php
Do not link the subject for the files app
Merge pull request #66 from owncloud/fix-cloud-activity-api

Fix cloud/activity API page