Upgrade to ruby 2.0.0
Update to ruby 2.1.1 and various gem tweaks to go with it
tweaking secret key settings to match what heroku already has
update travis.yml to use 2.1.1
apparently leaflet.ie isn't a thing any more?

https://github.com/Leaflet/Leaflet/issues/2159
attempting to fix libv8 problem occurring on heroku
tweaking less versions as heroku is complaining about later ones
Merge pull request #344 from Skud/ruby2

Ruby2