Simple ruby client extracted from api_tester.rb - no code change
un-hardcode app_key and secret_key in ruby client
Wrapped ruby client in OpenKit module:

No other code change.  Diff with 'git diff -b'
Client #request is public
OpenKit::Req -> OpenKit::Request
Adds OpenKit::Config class to ruby client
OpenKit::Request class methods for verbs (get, post, etc.)
Print in color
Updates api_tester to use OpenKit::Request API