punctuation fixes
shorter Facebook URL and added Google+
added a link to the r/openra community
add missing 404 title
Merge pull request #90 from Mailaender/404-yaml

Added missing 404 title
Remove unused gradient definitions from platform images.
Show off our awesome new trailer.
Merge pull request #92 from pchote/trailer-newspost

Trailer newspost
update YouTube trailer link to the latest revision
Merge pull request #89 from Mailaender/social-media-update

Small update to the Get Involved section
fixed punctuation
fixed broken wiki link
Update news post to highlight the new attention.
Merge pull request #94 from pchote/media-madness

Update news post to highlight the new attention.
Add social links (PNG icons for the moment) onto the front page.