Allow playtest download button to be disabled.
Remove duplication from social link definitions.
Remove duplication from page title definitions.
Overhaul download page generation.

- Remove remaining ties to the res0l server.
- Use GH API instead of raw http.
- Remove unnecessary duplication.
News post for release-20140608.
Update ingame news.
Update release ID.
Merge pull request #133 from pchote/new-release

Update website for June release.