Make Scooch play nicely with AMD

Status: **Opened for visibility**

Reviewers: ** @scalvert **

## Changes
- Added AMD/browser globals wrapper (from: https://github.com/umdjs/umd/blob/master/jqueryPlugin.js)

## How to test-drive this PR
- grunt serve

## How to test-drive this PR in an adaptive project
- Create your adaptive project as normal
- add 'selectorLibrary': 'empty:' to the UI config.js
- Require in scooch and use it

## Outstanding work
- Verify that this will still work correctly with how Mobify.js 1.1 exposes Zepto/jQuery