Ghost AI behaving erratically

The ghost AI seems to be behaving erratically at the moment.
Few suspected issues are:
- ghosts aren't obeying the 'never turn around' rule
- ghosts don't try to get close to pacman in case of paralell motion. They just keep moving in paralell. Suspect the problem lies in the way I've programmed the targeting.
- Should try to have each ghost mark it's target on the map and run the debugger
- all ghosts seem to turn in the same direction at the same time>

This needs to be looked into in detail and split into multiple issues.