Homepage & partners

FEATURES
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• New content / layout for the homepage
• added partners page to nav
• new partner sign up form
• new content for partners page
• misc styling

TODOS (I will make these issues)
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aaron todo: add in images on homepage
derek todo: add in neighborhood map and dropdowns on homepage
kyle/dan todo: we need an intro paragraph on the partners page. right now it says "Our partners are the cornerstone of Chicago Health Atlas." 

PULL REQ PREVIEW
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<img src="http://o7.no/15M5GA1">
<img src="http://o7.no/17qyRvA">
<img src="http://o7.no/17qyX6E">