Add dependencies to package.json and bower.json

Created by: skrivle

In order to let people npm or bower install bootstrap, we should make sure that the package files are updated with the necessary dependencies.

I see two deps (could be that a missed one):

Once the package files are updated we should also remove jQuery and tether from the vendor dir and link to the bower or npm version in the tests.

In order to get completely rid of the vendor folder, we could also add qunit as a dev dependency to the package.json.