Updated gem spec to require json rather than multi_json; Fog::JSON will attempt to load and use multi_json first and then fallback to require json; removed hard coded references to multi_json
Merge branch 'master' of github.com:fog/fog into json_lib
Adding multi_json to GemFile as it is now an optional dependency for the gem
Added tests for Fog::JSON; Added Fog::JSON::LoadError class; Updated all MultiJson references to Fog::JSON
Merge branch 'master' of github.com:fog/fog into json_lib
[core] fixing brittle json test
Merge pull request #1730 from rackspace/json_lib

[Core] Updated Fog::JSON to use JSON gem by default