Add deployment stages for Clojure 2014 and Python 2014
Update json from 1.8.0 to 1.8.1

This resolves an error with pow:

Gem::LoadError: You have already activated json 1.8.1, but your Gemfile requires json 1.8.1. Using bundle exec may solve this.

More info here: https://github.com/37signals/pow/issues/416