undo change to intro Fixes #16
Merge pull request #17 from nickdesaulniers/intro

undo change to intro Fixes #16
more on js
js is mostly done
more webgl
source tags and feature detection
Merge pull request #22 from nickdesaulniers/audioVideo

source tags and feature detection
Merge pull request #21 from nickdesaulniers/gfx

more webgl
Merge pull request #20 from nickdesaulniers/javascript

more on js