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
fix grammar
don't lose file size during rename
allow resharing of files with only share permissions
unwrapped strings fix
[tx-robot] updated from transifex
Merge pull request #8728 from owncloud/sharing_fix_reshare

allow resharing of files with only share permissions
Added requiremin/requiremax fields for apps

Apps can now specify a minimum and maximum version of ownCloud in which
they are supported.
Adjust core apps to use "requiremin" instead of "require"

Also added a few missing authors.
Merge pull request #8733 from owncloud/l10n-forgotten-tags

unwrapped strings fix
Merge pull request #8721 from owncloud/sharing_don_lose_filesize

don't lose file size during rename
fix warning text and margin
reverts 188c543 and translates only mail