Add SITE_URL to settings.
Add oembed endpoint
Merge pull request #135 from SCPR/oembed

Merges oembed feature and closes #132 and #135
Merge branch 'calfire_app'
Add Access-Control-Allow-Origin middlware
Remove /firetracker from SITE_URL, routes handling it
updates annual 2013 figures
Merge branch 'master' into calfire_app