Add backbone, marionette, jquery and underscore as devDependencies
Add backbone, marionette, jquery and underscore as devDependencies

In npm 3 peerDependencies will no longer automatically be installed.

More recent npm 2 versions already warn about this:

```
npm WARN peerDependencies The peer dependency backbone included from
maji will no
npm WARN peerDependencies longer be automatically installed to fulfill
the peerDependency
npm WARN peerDependencies in npm 3+. Your application will need to
depend on it explicitly.
```

kabisa/maji,kabisa/maji,kabisa/maji