Cherry picked applicable updates from coming-soon page
added desc and title meta tags
Added a twitter directive and upgraded the uwsgi ini
Merges Twitter share button fix and fixes FB share button
Changes twitter text and adds a #crowdlink
Adds twitter follow button to landing page
Minor changes to help. Closes #169

Conflicts:
	assets/help/faq.yaml
Added more information to the landing page

Conflicts:
	haml/home.haml