create TimeUtils module

Make a TimeUtils module to wrap all the methods for changing, parsing,
and formatting dates and times. Migrate in the methods for formatting
date strings and calculating the time remaining before a goal is
finished.
move and rename time_capture method

Move the time_capture method into the TimeUtils class and rename it
"select_hours_or_minutes".
remove obsolete methods from version.rb
extract output helper methods into OutputHelper
fix save_file in the features env.rb
include OutputHelper in main app file
expose and test hours_minutes
use TimeUtils in main app file