Getting started with some examples of tesitng models.
Added a section on testing functions
Updated test runner docs
Merge pull request #4 from jagthedrummer/jeremy/testing-models

Getting started with some examples of tesitng models.
Merge pull request #6 from mattjmorrison/testing-redux-karma-runner

Updated test runner docs
Documentation for unit testing ember controllers.
First pass at an example for a simple test helper
Add example of testing handlebars helpers by rendering a small template