changed buttons to divs so they span the entire bottom row
removed the save to photo library function
Merge branch 'master' of github.com:thehogfather/chi-bingo

# By Simon Robinson
# Via Simon Robinson
* 'master' of github.com:thehogfather/chi-bingo:
  Some tweaks to improve Android appearance

Conflicts:
	www/index.html
	www/js/app.js