simplify some method names and convert a couple functions to ES6 arrows
trying some ES6 template literals
Merge branch 'master' into camera-es6

Conflicts:
	dist/tangram-worker.debug.js
	dist/tangram-worker.min.js
	dist/tangram.debug.js
	dist/tangram.min.js
updates to support new version of Mapbox's vector-tile-js lib
Merge branch 'master' into camera-es6

Conflicts:
	dist/tangram-worker.debug.js
	dist/tangram-worker.min.js