http://osherove.com/tdd-kata-1/
finished instruction 1.1.
http://osherove.com/tdd-kata-1/
removed the fail
http://osherove.com/tdd-kata-1/
Finished part 1.2

fixed a bug in Add's number-limit

added checks
http://osherove.com/tdd-kata-1/
finished step 2
(step 1 was finished earlier, as latter sub-parts were notes instead of
tasks)
last step had a major mistake - it's fixed now

fixed last check in CalculatorTester
http://osherove.com/tdd-kata-1/
did part 3.1. - in Add: added functionality of '\n' similar to ','
part 3.2. isn't a task
http://osherove.com/tdd-kata-1/
done with part 4

added comments

canceled the neutrality of ' ' (letting it be a delimiter if the user
chooses so)
http://osherove.com/tdd-kata-1/
finished part 5