Update to RSpec version 2.99 in preparation to update to RSpec 3
Updated json_spec to version 1.1.2
Added initial working Docker configuration
Merge pull request #651 from rdsubhas/docker-support

Added initial working Docker configuration
Merge pull request #652 from rdsubhas/rg_update_rspec

Update to RSpec version 2.99 in preparation to update to RSpec 3