Fixed issue with "End" field not updating on member create (issue #25)

Fixed issue with "End" field not updating on member create.
Copied "Key" module to create "Day_Pass" module (issue #22)

Copied "Key" module to create "Day_Pass" module
Replaced all instances of "Key" with "Day Pass" (issue #22)

Replaced all instances of "Key" with "Day Pass".
Replaced all instances of "kid" with "dpid" (issue #22)

Replaced all instances of "kid" with "dpid".
Replaced all instances of "Start" with "Purchased" (issue #22)

Replaced all instances of "Start" with "Purchased".
Replaced all instances of "End" with "Used" (issue #22)

Replaced all instances of "End" with "Used".
Replaced all instances of "Serial" with "GUID" (issue #22)

Replaced all instances of "Serial" with "GUID".
Various finishing touches for the "Day Pass" module (issue #22)

-Changed "daypass" to "day_pass"
-Miscellaneous tweaks
Updated config.sample.inc.php to include new module (issue #22)

Updated config.sample.inc.php to include "Day Pass" module.