Merging css stuff to master
Adding custom font, making inputs with values read-only
Applying basic CSS and new background
Changing background color
Merge branch 'master' of github.com:NicoSa/Sudoku-Web-Version

* 'master' of github.com:NicoSa/Sudoku-Web-Version:
  added all relic stuff
  put curr or puzzle in get slash back in place
  no save button, just retrieve, info is saved when check solution
  added retrieve method to sudoku rb
  added savebutton
  added save post in sudoku and index erb
  deleted string line in solution
  added newrelic crap
  added newrelic to gemfile and config
Fixing conflicts