Refactored Widget Custom UI and Storage Frame widget

Moved button command string functions

Added loadHandler to set URL after iframe loads

Refactored the Storage Frame widget

Removed quotation marks from var name

Removed old code and changed var name

Refactored Widget Custom UI

Incremented app engine version
Merge pull request #4 from Rise-Vision/feature/apply-iframe-component

Refactored Widget Custom UI and Storage Frame widget
Adding Billing Administrator and Purchaser roles

These roles are required for the Store release