Created TSBusinessDay class with several utility functions including isOpen(). All functions can be accessed like so: ->theFunction().

git-svn-id: https://plugins.svn.wordpress.org/ts-business-hours/trunk@837840 b8457f37-d9ea-0310-8a92-e5e31aec5664
Added example.php

git-svn-id: https://plugins.svn.wordpress.org/ts-business-hours/trunk@837842 b8457f37-d9ea-0310-8a92-e5e31aec5664