Beta0.4 - Comments & Changing 'pop'

Pop still needs work, it pops the taxi from the front but then it
removes everything after that so taxi 2 is the only one left in the
queue.
Beta0.4 - Fixed The 'pop' Deletion Problem

But now it adds empty taxis with pos 1 and num 0. Fix by going through
the queue and tidying them up after if their number is 0?