allow moving by color
Merge branch 'master' of github.com:ornicar/chessground into abs

* 'master' of github.com:ornicar/chessground:
  Change mobile example
absolute positioning of squares
tweak square-element
Merge branch 'abs'

* abs:
  tweak square-element
  absolute positioning of squares
  allow moving by color

Conflicts:
	src/chessground/render.cljs
Merge branch 'master' of github.com:ornicar/chessground

* 'master' of github.com:ornicar/chessground:
  Use mouse down event instead of click
  Allow to reselect an unmovable piece
  Again modify mobile example

Conflicts:
	src/chessground/render.cljs
disable center piece