Responsive Grid

I set up the interactive map with Jquery chosen and put it in a
responsive grid.  It should work on most screen sizes pretty well now.
We just have to fix the form to post data to the server now and
proabably tweak this a bit.
Merge branch 'development' of https://github.com/PhillyOpen/cyclephilly.org into development

Conflicts:
	cycleatlanta.org/rides/index.php
	cycleatlanta.org/rides/js/main.js