Modified styles.
Now template processing also handles inner models.
Modified model system. Now There is always basemodel, which contains needed data for all pages (username, now playing...).  Now processing only takes BaseModel.

Also added interface for player, but only mocking it, until vljc can be implemented properly.

PlaylistItem model now contains artist name and track name and it is shown on the front page. Edit page placeholder was removed, until proper editing is thinked trough. Playlist is still only contains mock data.

Also, now playing bar is added for pages.