Added Repeater class in handlers.py.
added biweekly_repeat to Repeater.
gave each repeater its own class in handlers.py.
bug fix: count_first incorrectly set to True in Weekly_Repeater. + test
fixed broken tests related to switching to OO handlers.
fixed test w/ py3
fixed bug w/ next_event showing wrong event +test.
handlers.py: removed returns and fixed biweekly repeat.
fixed broken test in test_handlers.
added new test: integration_tests/test_multi
renamed repeater.py to upcoming.py
cleaned up handlers.py
added version# and url to __init__. Updated setup.py