Implement the register function of OC\ContactsManager
$key is not needed for registering contactsmanager callbacks
Supply the contactsmanager object to the callbacks
camelCase vars in OC\ContactsManager
Merge branch 'master' into contactsmanager-register

Conflicts:
	lib/private/contactsmanager.php
Fix wrong var name
Merge branch 'master' into contactsmanager-register

Conflicts:
	lib/private/contactsmanager.php
no return on register and unregister
php upload errors are written to log
Fix phpdoc
fileList needs be be declared before the if-statement
always check for unique filename, if a file gets added from outside the mount
point should be adjusted to ne unique again
prevent default action when clicking on the share notification
Merge pull request #8671 from owncloud/log-upload-errors

php upload errors are written to log
Add a config option fro setting the filesystem watcher policy
Merge pull request #8675 from owncloud/sharing-improvements

Sharing improvements
Make the recursive delete more robust
Show less whitespace above publicly shared images
remove noise texture from interface (not necessary, and blurry on high-res)
fix share label creation