Dialogs: Height fix
Helpers: Added docu
Version bump

* Themes: Refactored theming
* Windows: The given dimensions will now work correctly
* Backend: Bugfixes for PHP
* Applications: Small fixes for dimensions
* dist: Fixed xmpp stuff
* Helpers: Moved UploadFiles and SettingsManager to OSjs.API
* Helpers: New DefaultApplication
* Helpers: New DefaultApplicationWindow