rewrote most of the tests and now have failures - hooray
can now subtract_1_minute_from_end_of_a_resting_hour
tests found bug adding minutes to patterned hours
subtract exact amount of available minutes from patterned hour
refactored difference tests - no failures
test added to catch failure when running updated test_day.rb
start of rewriting tests for the Day class
release for v0.3.3