introduce shortname themable string and split from title, use for image alt text
use themable strings for installation
use themable strings for admin page, simplify admin export, fix rest of #3791
reword WebDAV auth to not have 'ownCloud' anymore
reword LDAP config and use themable strings, fix rest of #3791
Include $defaults
use $defaults->getName() as webdav REALM
Merge branch 'master' into more-themable-strings

Conflicts:
	lib/template.php
Merge pull request #4030 from owncloud/more-themable-strings

More themable strings