re-add missing Backbone.$
remove old ie / non-pushstate support from BB.history
Merge pull request #11 from akre54/no-ie-fallback

Remove old ie / non-pushstate support from BB.History
remove old ie PATCH support fix
Merge pull request #12 from akre54/no-patch-fix

remove old IE PATCH support fix
Update README.md
use Object.create(null) for model attributes. Use keys as ya please
Merge pull request #13 from akre54/null-attrs

use Object.create(null) for model attributes
Update README.md