build
Merge branch 'master' of https://github.com/theopak/drought.io
Removes unused scripts and dependencies.
Revises zoom behavior to use zoom transitions to focus on an object's bounding box rather than an arbitrary zoom level. Also enables free zooming. Thanks http://bl.ocks.org/mbostock/9656675
Major changes:

- Constrains size of `<drought-map />`:
    - fits in the top part of the window (or if the window is small, then it takes up all of the window except the banner).
    - initial scale is smaller.
- Constrains size of `<rain-chart />` so that it's never bigger than the window, even if it's too big to be initially in view in the window.
- Updates color scheme and visual styles.
- Changes :hover states on svg and path so that opacity is the only animated change.
- Updates README to contain actually useful information about the project.
- Updates screenshot.
Renames `charts.css` --> `view.scss`.
build for deploy
Slightly improves icon and colors. Still not perfect.