bundles

* Bundled dependencies, aka multiple AMD modules in the same file. aka handlebars/ember etc.
* ability to remap all modules in a bundle
* deanonymize is now remap

- [x] fix import 
- [ ] fix relative path resolution
- [ ] fix relative path remapping
- [ ] remap non-local imports, aka remap htmlbars handlebars
```js
emberLeaf.remap("ember@2.0.0", { rsvp: "rsvp@3.0.9"})
```
- [ ] remap, should return a new leaf instance (leaving the original untouched)
- [ ] add remapDependencies
- [ ] add resolveRelativeModules
- [ ] enable remap to also support, remapDependencies and resolveRelativeModules in 1 step

[fixes #12, #11, #2]
I'm not sure if this can be done with 100% guarantee with SA, largely because you can't capture dynamic assignments.  It might be best just to have the default. Unless you have any ideas?