transition-* ⇢ *-transition

https://github.com/mapbox/mapbox-gl-style-spec/issues/148
Support pixelRatio parameter for render tests
Match native
Update changelog
v0.3.0
Update site to v0.3.0
Make browserify deps non-dev (fixes #752)
Merge branch 'mb-pages' of https://github.com/mapbox/mapbox-gl-js into mb-pages