Add link to live demo
Minor README tweaks.
Add description to live demo link
Merge branch 'master' of github.com:firebase/backfire
It's always more prose than code.
Update README.md
Update Backfire to latest callback signature (takes effect on Monday)
Merge branch 'master' of github.com:firebase/backfire
Merge branch 'master' into gh-pages
Merge sync version from master
Add syntax highlighting to README