Add LDAP nested groups

[encryption] don't overwrite keys if rename was done by a stream copy

Forward port of 6d3b5b24fd4f82c1cbfbc4cade5246a0335f8dda to master

Show svg mime icons when no preview is available

Update page title when navigating through directories (local)

Allow apps to add/modify config js output via hook.

This is needed for JS Unit tests to run properly as they are expecting
the new "oc_default" map to exist.

Added extra checks for ext storage class

Add overwritehost config on setup and upgrade

No css js delivery via php

use true instead of 1

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