Update EventListing.php

enforce the limit
Update EventListing.php

cast the `limit` to `int` to sanitize input
Use newly added item guid for unique identification, and fix handling of event time
Merge pull request #12 from mfairchild365/master

Quick Fix: enforce Upcoming events limit
Only import home events
Update datetimes instead of adding new ones

In the event of a reschedule, etc...
Also check if the additional info changed
Merge pull request #13 from mfairchild365/master

Athletics import improvements
Import original project documentation
Merge branch 'master' of github.com:unl/UNL_UCBCN
Add a list of public contacts for an event
Merge pull request #22 from mfairchild365/issue-18

Add a record list for an event's public contacts
Merge from master and resolve conflicts