remove dialog javascript that should be part of refinery core.
Merge pull request #5 from ghoppe/move-dialog-js

remove dialog javascript that should be part of refinery core.
Require refinery/admin.js to fulfill dependency
Merge pull request #6 from ghoppe/take-2

Require refinery/admin.js to fulfill dependency
Directly decorate Refinery::Page::FriendlyIdOptions