First pass for www api support

This is a work in progress. Just sharing the PR to track the work... This will probably be done next week at the hackathon. 

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The api task currently compiles the jsdoc and reads it into a ruby hash of properties, functions, and classes.

The next step is to create templates for:
+ sidebar
+ Marionette namespace w/ functions, properties, classes
+ Marionette class

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Down the road, the build phase would have to loop over tags of marionette that support jsdoc - but for now we'll just grab the most recent.