Make a move by clicking on the chess board

You can now click on the chess board to make a move. There are still
some changes to be done, e.g. the formular doesn't work for newly
created games.
Merge remote-tracking branch 'origin/master'

Conflicts:
	app/views/games/show.html.erb
Merge branch 'master' of https://github.com/PerezReyLorena/WE_Mini-Project

Conflicts:
	app/views/games/show.html.erb
Display figures

I had some problems with syncing but
I got whole thing to work now. It is only
missing the possibility to make a move
by clicking on the chess board. But I will
implement it today.