finished refactoring of Day tests
updated Clock.rb tests
tests for Module Workpattern and document raise
total minutes of week is zero when short week starting after Sunday (#15)
last add minutes test - creation already done
Subtracting starting from top of the hour and last minute is non working (#18)
test for issue (#19)
removed stringio requirement
finished updating Week.rb tests
added console Rake task
hide instance variables
hide instance variables in method duplicate
hide instance variables in class Week
attr_reader replacement improved performance and hid instance variables
refactored set_attributes
refactored subtract
DRY for total_minutes
updated version number
removed if/else for offset
used ternary in delete method