* Added "Flickylist = DEMO" option, creating the five species of flicky...

* Added "Flickylist = DEMO" option, creating the five species of flicky similar enough in appearance to the Freed Animals from the days of yore.
* Set the default flicky group to be equivalent to Flickylist = Demo.
* Refactored a little. (This also removed a crash-causing typo in a Z_Free in P_ClearSingleMapHeaderInfo.)