Adding charitable 501c3 field

- fixes #542
Adding charitable event as a radio button
i r dum
Merge pull request #576 from rackerlabs/gh-542

Adding charitable 501c3 field
atom.xml feed for the blog
Merge pull request #578 from rackerlabs/atom-feed-redux

atom.xml feed for the blog
Setting sponsorships notification email to my personal one for staging.
Changing file upload default to 50m

- Fixes #579
Merge pull request #580 from rackerlabs/gh-579

Changing file upload default to 50m
Re-adding GA code to page. Tealium not working.
Merge pull request #582 from rdodev/urgent-ga-fix

Re-adding GA code to page. Tealium not working.
Merge remote-tracking branch 'upstream/dev' into dev
update 501(c)(3) text