[FEATURE] Replace cssParser with more lean solution

* cssParser is not needed anymore (parsing is done with DOM access only, no AJAX request, no heavy parsing)
* Drops "side-by-side" class for halign objects (the given classes should only enchance the site, so when javscript is disabled, nothing will break)
* Adds a temporarily dirty solution of scrollbar width for the calculation of the halign object width)

Fixes #3