Added backup for config.php in autotest.sh script

Hide defaultavatar in #header and don't darken proper avatars in #header

The script now checks for config.php existance and backs it up before
running the test, then restores it back at the end. This avoids the
situation where devs lose their manually edited config if they forgot to
back it up before running the unit tests.

The script now also checks for config.php permissions beforehand to
avoid displaying an annoying HTML page output in the console with an
error message.

only perform files upgrade in case there are actually entries in the old...

File Selected on Click instead of download.

Whitespace fix for share.css

Design finetune

Fix require in apps/files/ajax/rawlist.php

Thanks @tanghus for pointing out the unneccessity of it.

Fix autoloader regression

Fixing broken layout in master due to APC enabled

Public API OC6 - introduce lib/private

put the current version and edition into a seperate file to simplify

Conflicts:
	lib/util.php

put the current version and edition into a seperate file to simplify packaging. introduce update channels and build version for automated channel updates. More about that later

Conflicts:
	lib/ocsclient.php
	lib/util.php

Shoudn't make a difference in this case but just in case

Conflicts:
	lib/ocsclient.php

don't remember login if the encrypion app is enabled

Conflicts:
	lib/private/vcategories.php