add happy hour enum, refactor get_detail_category
Adding support for happy hours

Added to parser and location info. Need to create a happy hour class
that takes minute ranges and outputs pretty strings of the happy hours.
Good start on happy hour class
happy hour support

First pass on adding happy hour information is added. I'm not sure how
to display it, however.
fixed bug with 12pm times

If a time in the 12pm hour was specified (not using noon) it would get
converted to hour 24 and therefore am. Ooops.
added noon and midnight
better tab detection
bug fix if pm is specified in end time
testing happy hour
removed old file
updated readme with happy hour stuff