Bug 868375 - Change the assertions.js module so that Assert is the base class instead of Expect. r=hskupin
Bug 846007 - Updated controller.dragToElement() method. r=hskupin
throws() and doesNotThrow() methods in the assertions module do not correctly handle native errors. r=dhunt
Bug 887202 - Add errors module to have a central location for custom errors. r=dhunt