Refactor navigation extension.
Remove empty Community pages. Fix a broken link.
Merge pull request #45 from scottfrederick/community

Remove empty Community pages. Fix a broken link.
Merge pull request #46 from scottfrederick/nav

Refactor navigation extension.
Move quick links to navigation.rb. Added orgs and spaces
Removed static quick links
Fix rubygems in Gemfiles in examples
Merge pull request #47 from andypiper/gemfix

Fix rubygems in Gemfiles in examples
Copied MCF page over from old docs§
Merge branch 'master' of github.com:cloudfoundry/cf-docs