puts the Official banner on everything, not just the homepage
Merge remote-tracking branch 'origin/staging' into banner-everywhere

Conflicts:
	pages/index.html
Puts the flag stuff in an include that we just drop into templates
fixup! Puts the flag stuff in an include that we just drop into templates
Merge pull request #392 from 18F/banner-everywhere

Puts the Official banner on everything, not just the homepage