Feature intents api

refs #6 

Included in pull request: 
* [Intents Api Foundation](https://github.com/ozone-development/ozp-iwc/wiki/intents.api)
* [Intents Capability Value](https://github.com/ozone-development/ozp-iwc/wiki/ozp-intents-type-capabilities-v1-json)
* [Intents Definition Value](https://github.com/ozone-development/ozp-iwc/wiki/ozp-intents-definition-v1-json)
* [Intents Handler Value](https://github.com/ozone-development/ozp-iwc/wiki/ozp-intents-handler-v1-json)
* Intents integration test foundation
* Intents unit test foundation

not included:
* broadcast / listen functionality
* invoking functionality (currently stubbed to a console.err function call)