Epic: Spike and Prototype on Visual Canvas and Composition - front end piece

[altsang]

As a SL developer using Arc, I would want a way to visually compose course grain APIs that client views would directly consume that is made up of microservices models, so that I can service clients more efficiently.

Two pieces:

1. the canvas - which shows models and data sources
2. the ability to make a composite model out of micro service models

two parts: back end and front end

• [x] need to explore D3 for early UX exploration from our studio discussion:
• https://drive.google.com/open?id=0B1FTzkB7697GZnByamFQZzhHV0k&authuser=0
• https://drive.google.com/open?id=0B1FTzkB7697GU1RyY1Q4UkNfbkk&authuser=0
• [x] foundational piece is to show canvas view - model and datasources
• [ ] composite model will only runnable on the StrongLoop Gateway
• [ ] composite models can inherit properties AND methods

[altsang]

@jtary -changing this to be spike and going into prototype for the canvas portion until Raymond has a better handle on composite models

[chandadharap]

Document approach, tech design on wiki under Spikes. Break up into stories.