New link and info for getting a Username and API Key
Domain classes, better builders blog post.
Added link to the channel logs
Removing no-longer-that-new quicknews item
Update compute.md

fixed "with" word with "want" word
Force Jekyll 1.5.1
Cleaned up BlobStore Start Guide and fixed minor typos
Add Mesosphere to users page
Update docs for HP Helion Public Cloud

Corrected identity and credentials tips
Added new HP Helion logo
Fixed links to new Horizon console
Add Mesosphere to users list