trying out another approach to attribute dispatch
Revert "trying out another approach to attribute dispatch"

This reverts commit bf6cd3de55bb17cab3ac1938566590e6e5eb78da.
added a request header for imgur
bumped version
Use RawGit to link to latest version of platform.js
Add CSS workaround suggested by IE team

https://connect.microsoft.com/IE/feedback/details/934814/x-gif-images-fail-to-render-updates-unless-mouse-moves
Fix up demo pages