structure for dropdown nav in smaller devices
styled dropdown for smaller devices
js to toggle in menu in small devices
moves responsive styles into dedicated stylesheet
changes the name of gray-btn to just btn since it no long makes sense.
getting rid of resizing badge-thumb-container via js. will bring back if necessary.
updates responsive styling for most obvious things, until more functionality gets flushed out
Tweaks to edit page
Merge branch 'master' into responsive-navz

Conflicts:
	app/templates/badge/edit.html
	app/templates/directory/home.html
Merge pull request #161 from mozilla/responsive-navz

Responsive all the thingz