internals.output expects an error object, updated double call check on done to provide such
Merge pull request #88 from jasonpincin/master

updated double call check on done to provide error to internals.output
3.1.1
Clarification on how to run lab's tests.
Also some notes on how to use make or npm to run the tests.
Improved explanation of running lab's tests
Merge pull request #89 from AidenMontgomery/master

Added a section on running lab's tests