- added new OCA.Files namespace for files classes
- the sidebar can now switch between views/containers
- the trashbin renders in its own container but currently doesn't work
due to overrides
- added app.js as entry point for JS code (ideally all other files should
only contain classes and not trigger anything)
Apps can now register navigation items into the sidebar of the files app.
For every sidebar item there is a container.
The container's content is rendered based on the script name given at
registration time.