Update copy, title, and meta description.

- Updated SMC-Connect screenshot

- Added links to demo websites

- Updated SMC-Connect description

- Added links to generic repos with explanation

- Removed irrelevant footer links and images

- Updated Contribution section and added a Get in Touch section with link to @ohanapi on Twitter
Updates Grunt to add JSHint

I had an update to grunt kicking around that this is as good a time as
any to push.
Merge pull request #3 from codeforamerica/seo-and-copy-updates

Update copy, title, and meta description.

@monfresh Thanks for updating this. Just needed one CSS tweak, which I added.