The "deleteAll" method on the Common storage class isn't used anywhere.
Also, it isn't defined on the Storage interface so this fix removes it
completely.

The method deleteAll() doesn't officially exist on the Storage class as
it's not defined on the interface, which means it fails on the Quota
storage wrapper and might fail on some external storage classes.
Also, this here is the only use case for that one method.

Added extra checks for ext storage class

Add overwritehost config on setup and upgrade

No css js delivery via php

Updated submodule to include XML processing fixes

Use SVG icons in New file menu

Fix usersPath bug

fix thumbnail generation for subdirectories in the conflicts dialog

fix viewport size on windows phone

fix sharing unit tests

ignore optional additional config files

add unit test for \OC\URLGenerator::getAbsoluteURL

Header optimizations for mobile

Fix "headers are already sent" introduced with #6519

Remove unit tests which causes the filesystem tests to fail

Conflicts:
	config/config.sample.php

Jenkins somewhat complains that there are already sent headers.

LDAP: fix and extend tests

Move isadmin to template and rename it to oc_isadmin