minor fix
Merge branch 'heroku-master'
Merge branch 'master' into on-heroku-master
How to
Merge remote-tracking branch 'origin/master'
Merge branch 'heroku-master'

Conflicts:
	public/partials/howto.html
Merge branch 'github_master'
- calculate visitors (regions)
- calculate visitors (regions)
- calculate visitors (regions)