Move development dependencies into Gemfile
Update hashie dependency to version ~> 2.0
Update rash dependency to version ~> 0.4
Remove multi_json dependency
Update faraday dependency to version ~> 0.8.7
Update faraday_middleware dependency to version ~> 0.9.0
Add Code Climate badge
Add Gem Version badge
Add Gemnasium badge
Test against Ruby 2.0.0
Update copyright year
Replace maruku with kramdown
Update to API v3