remove unused ng if
Merge branch 'master' of github.com:michaelknoch/de.htwg.wt.go

* 'master' of github.com:michaelknoch/de.htwg.wt.go:
  serve game instances
implement scale directive
add directive.js
codestyle
responsive cells
Merge branch 'master' of github.com:michaelknoch/de.htwg.wt.go

* 'master' of github.com:michaelknoch/de.htwg.wt.go:
  adjust api
  json rendering is a bithc
  extend routes
  fix multiple instances