Add basic Acceptance TDD as template to follow

[anoop2811]

We would like to use the double loop TDD model for writing code which involves writing the acceptance tests first and then the unit tests. Will be pragmatic about it and the advantages would be getting a better coverage over time and discipline. For more details read this:
http://coding-is-like-cooking.info/2013/04/outside-in-development-with-double-loop-tdd/