* Separate tags by space

Bug fixes for mkdir(), renaming/moving support for files inside a shared folder with write permission

New system of unsharing files from self, and a small bug fix when all files inside a shared folder are unshared from self

Also use OC_User::isLoggedIn to check if new authentication is needed for grouplist.php and userlist.php
For validateuser.php, credentials are always needed.

Functions to get the token of a public link now stored by OC_Share, remove no longer needed ajax call to getlink.php

make the help section working and pretty. knowledge base entries are fetched via OCS from a different server. cool stuff