First steps at implementing AngularJS

- no more go templates, one index.html files wich gets served
  by go through the root "/" handler.
- no more jquery countdown, super simple countdown iplemented in
  angular controller
- Todo: make pauzer.go more Restful with proper Json responses
cleanup unused js librarys
get serverstate on page load via /state handler
extracted css from 404, renamed in whith html ext
Added Makefile to minify js and build pauzer
Proper makefile, -min ext for minified resources
little cosmetic fix