Update bower references to use bower registry names

[ProLoser]

Right now the bower.json points directly to angular-ui/ui-validate, etc. Instead it should use the bower registry names like angular-ui-validate and should (possibly) be version locked. Not as strongly opinionated on the latter.

[PowerKiKi]

I would actually try to get rid of ui-utils altogether and convince people to user dedicated repositories instead. So I wouldn't put much time in that IMHO

[ProLoser]

I would like to keep this repo around at least for a short period to allow people to make the transition. Even https://github.com/angular-ui/angular-ui-OLDREPO is still online (for archive purposes). I would still like to just point the bower dependencies to the right place since that will make it fairly forward-compatible.