Improve semver ranges in bower.json

Some of the previous ranges didn't really make sense and seemed unintentionally restrictive. (e.g. Allowing jQuery 2.1.0 but no other 2.1.x releases.)

If there was a method behind the previous ranges, feel free to disregard. :)

<!---
@huboard:{"order":1524.0,"milestone_order":1671,"custom_state":""}
-->