Partial fix for issue #15. Added recurrence information to web service response.
Added the ability of the web service to accept a time parameter ("t") in a GET request so that dates other than the current system date may be used during testing. For example, "/svc?latitude=30.266851253708257&longitude=-97.74312973022461&t=May+2+2013" forces the service to use May 2, 2013 as the current date. If "t" is not provided, the current system date is used.
Define $current_date override only if ?t= query parameter given.
Document in README.