Integrating testem-simple for auto execution of tests

So you are welcome to reject this if you want to keep some organization of things the way you had it.  No big deal to me.  But at the very least this shows the path to getting the testem integration in place.  Isn't too hard. =)  I did have to update the testem dependency in `mimosa-testem-simple` for a reason I still don't quite understand...but it made the tests run when previous they would not.

This keeps the `testem.json` in the root of the project for each access and execution, but places all the pure test dependencies out of the way and in a `test` folder.

Also checks in the `.mimosa` folder so that people using this don't _have_ to execute bower installs if it isn't necessary.

Upgrades Handlebars client to 1.0.0, otherwise I couldn't get it to work for some reason (you might be on old mimosa?).

Also uses the ability with the latest Mimosa to fix the version of Emblem so that upgrades to Mimosa don't break compilation here.