blurs now use pre-multiplied alpha to avoid color bleeding out of transparent regions
use absolute library source
added reference to siggraph talk
check for floating-point texture support, possible fix for #13
added old jinja templates for gh-pages + build script
remove toDataURL() polyfill, fixes #7
update global webgl context before calling texture methods, fixes #11
Merge branch 'master' of https://github.com/evanw/glfx.js