making trials more flexible by turning the submit page to a variable ($postTo)

adding $keysNeeded array to scoring.php... in the near future $keysNeeded will become very important for custom scoring schemes
making stepouts work like all other trials
removing unnecessary code for stepout trial
Merge pull request #4 from adamblake/checkphp

Allowed IP feature for checking ips (check.php)
Adds blacklist toggle

Blacklist will reject any user trying to participate from an IP that has
already participated. Add any IPs you want excluded to the whitelist array