Rendering JSON errors on GH API down.

Instead of just throwing an error and letting the server crash.
Merge pull request #41 from rhyolight/graceful-error-handling

Rendering JSON errors on GH API down.
Added missing error handling.

Fixes #43.
Merge pull request #44 from rhyolight/bugfix

Added missing error handling.
Accomodating new repo for numenta.org (for doc build).
Merge pull request #47 from numenta/website-repo-change

Accomodating new repo for numenta.org (for doc build).