Last content updates before OS push.
Revealing website.
Added help email address for commercial license contacts.
Removing some unimportant footer lines.
Adding Jeff's first Introducing NuPIC news post.
Removing related content links from blog entries for now.
Adding a link to Jeff's introduction on the landing page content.
Merge branch 'gh-pages' of https://github.com/numenta/nupic into gh-pages