We added single quotes instead of double quotes
because c considers quotation marks to indicate string,
while single quotes means char.
FENCEPOST ERROR IS A JERK!!!!!
got xplor to recurse through maze to the south.
check if we're done and come out of recursion if so.
mod maze to stop at proper stop point
added a delay and printgrid to watch progress, also
added exploration of other directions than south.
also fixed endgame check to just test if we're at endpoint,
then immediately exit.