Add UserSession to server container
Add DBConnection to server container
Add Navigation class to server container
Add Config container class to server container
fixing typos
fixing PHPDoc
fixing typos + adding missing filed $activeEntry
PHPDoc & get UserManager from container for RooFolder
Add missing implements and fix parameters in IConfig
Merge pull request #4928 from owncloud/interfaces

Add a couple of interface definitions
More trimming
OC_VCategories=>OC\Tags. Public interface + getter in server container
fixing namespaces and rename hasCategory to hasTag
Updated method names and added a few more tests.
Add another test.
Added more error checking in add()
Forgot to return false if add() didn't add anything.
Use fetchOne() instead of numRows() when doing a COUNT(*).
Moar tests.
Fix conflict