Force checkpoints

Yo, heres a working force checkpoints, however will need a little fixing
and I don't have more time so feel free to fix it, else I can just do it
tomorrow.

What is needed
-Print out text when you enter a wrong CP
-Check if you acquired the latest CP when reaching end to get the ending
message. I have no idea why my version of it isn't working but atleast
server doesn't crash :P hf
Merge branch 'master' of https://github.com/etjump/satchelrace