Feature: implemented for older version

[vance]

I made a mod that allows for supplying two templates, the "wrapper" and the modal template. This way you can share certain root nodes/styles between different modal sets without template duplication. Would this be a desired feature that you might pull? If so, I can make it compatible with the Angular 1.3 version. Currently it only works with the older version.

See this Gist: https://gist.github.com/vance/ef8a5714fc116c8ab247