[React] New react-backbone todomvc with fixes and React version bump

Like #855, bumped React version (along with all the other deps) and made
some fixes.
Merge pull request #857 from chenglou/react-bb

[React] New react-backbone todomvc with fixes and React version bump
Added a test to verify that routing works with the back button
re-instated the react-backbone tests
Merge pull request #860 from ColinEberhardt/react-bb-is-back

re-instated the react-backbone tests
Merge pull request #859 from ColinEberhardt/routing-test

Added a test to verify that routing works with the back button