Merge pull request #11858 from owncloud/fix-11064

Allow any outgoing XHR connections
Merge pull request #11864 from owncloud/clear-session-after-logout

Clear session after logout
Merge pull request #11867 from owncloud/settings-sidebar-admin

introduce sidebar for admin page
Merge pull request #11740 from owncloud/update-archive-tar

Update pear/archive_tar to 1.3.13
delete all children's previews when deleting a folder

add phpdoc
remove unnecessary require calls - the ownCloud class loader is supposed to take care of this
prevent PHP notice
Merge pull request #11659 from jknockaert/master

rework getFileSize
Merge pull request #11080 from owncloud/addheader-text-2

Fix the addHeader tag attributes text methods to not ignore the text parameter
Merge pull request #11877 from owncloud/fix-11875-master

prevent PHP notice
[tx-robot] updated from transifex
Merge pull request #11850 from owncloud/fix-11848

on xp'ed mode and switching configurations: save raw mode instead of tog...
Merge pull request #11539 from owncloud/mount-setup-once

Only mount the storages for the user once
Clear session before setup

Fixes https://github.com/owncloud/core/issues/11861
Merge pull request #11876 from owncloud/remove-pointless-requires

remove unnecessary require calls - the ownCloud class loader is supposed...
Merge pull request #9044 from owncloud/add-missing-email-principal

adding missing email address for principal
Added script to build the JS documentation
Improved Javascript docs for JSDoc

Added namespaces so that JSDoc can find them.
Fixed a few warnings.
Improved some comments.
Add CodeClimate indicator
Merge pull request #11888 from owncloud/add-code-climeate

Add CodeClimate indicator