Manage bower dependencies with grunt-bowercopy and track all files used.

I recently wrote a grunt plugin for scrupulous management of file locations for bower dependencies. Not only can we stick files where we want them (like sticking sizzle in the source folder), but we can mollify some jQuery team members and track our dependencies. Whenever we want to update a dependency, we can update the bower.json and run `grunt bower` or `grunt bowercopy`.

Let me know what you think.