Added sprinter and new handler for showing issues.

I want a page that displays issues across all repositories. I've handled
the server part that fetches all the issues, but just dumps JSON when
user hits /issues. No templating is in place yet.
Updated readme
Merge branch 'master' of github.com:numenta/nupic.wallboard into add-issues

Conflicts:
	README.md
	package.json
Merge pull request #35 from rhyolight/add-issues

Add issues