Added statetest and moved HTML files to dir public.

Statetest.ts has been added to fiddle around with transitions between
different game scenes (e.g. title screen, a level, the main menu,
and so on.)
HTML files have been moved into a dedicated directory. This will probably
be overridden by another commit.
Fuck this noise.
Merge branch 'master' of https://github.com/troiganto/overtop

Bring together the changes by Taschenschieber with those of troiganto.
Bring together changes by Taschenschieber with those by Troiganto.

Removed changes by troiganto that had already been done by Taschenschieber. I.e. deleted dir public and moved its contents to dir htmlpub.