added specular term
cleanup
assign an id # to each web worker (add a worker init event)
Merge branch 'master' into selection
skip attribs not found in program to avoid GL errors
style parsing & selection map entry generation
fix leaky GL context in 'gl' var
added rainbow cycling shader
made spec its own light
syncing with master
syncing with master
sync with master
cleanup
add map panning state and standard names
working toward environment lighting
Merge branch 'rainbow-tex' of https://github.com/meetar/tangram into meetar-rainbow-tex
hsv2rgb2 -> hsv2rgb
reset default building rendering mode
Merge branch 'meetar-rainbow-tex'
Merge branch 'specular-dev' of https://github.com/meetar/tangram into meetar-specular-dev