Ember1.0 cleanup

1. move source out of the horribly nested structure needed for ember-dev
2. use grunt-banner to add the license notice back to the generated files

the banner template could probably be improved to read the git hash info similar to what ember-dev does so we get something like this again

```
// Version: v1.0.0-72-g3f73800
// Last commit: 3f73800 (2013-09-09 16:24:42 -0500)
```