s/loadMoreData/onBrush
Simplified trip model and xhr requests

And Angular doesn’t need to know about extent, xDomain, and yDomain
anymore.
Computing the feature collection in React

Work in progress. Moved some methods to helpers.js, some to
RawView.jsx. I’m going to change things to be modularized and cleanly
isolated.
Minor changes
Angular will only pass the data object to React
Moved stuff to RawView.jsx
Simplified raw-directive.js