Merge pull request #49 from fiftyandfiftyorg/leah-updates

adding icons to us programs tabs
added images
Merge pull request #50 from fiftyandfiftyorg/bm-testimonies

added images to testimonies
conditional check for 'show_link' field
Merge pull request #51 from fiftyandfiftyorg/bm-testimonies

conditional check for 'show_link' field
Merge pull request #52 from fiftyandfiftyorg/leah-updates

Leah updates
updating school calculator
updating nav on mobile
updating mobile nav
putting icons into a sprite for faster page loading