Introduce bower dependency managment for frontend libraries

JS unit tests fix - use toBeUndefined() instead of toEqual(null)

First check whether it is the default config before touching

* fix JS unit tests

* add addVendorScript & addVendorStyle
* refactoring of addScript and addStyle
* add shortcuts vendorScript and vendorStyle

Update Pimple to V3.0

Symfony composer

Potentially fixes https://github.com/owncloud/core/issues/11678

Capitalize Checks in admin page

Fix ldap convertSID2Str() / Remove BCMath dependency

move versions if a file was renamed in a shared folder

Also explicitly format sub-id integers as unsigned, which is required for
32-bit systems.

Enhance question in DB migration script

fix odd behaviour

Add CodeClimate indicator

adding missing email address for principal

remove unnecessary require calls - the ownCloud class loader is supposed...

Only mount the storages for the user once

on xp'ed mode and switching configurations: save raw mode instead of tog...