Automatic Unit Transform flags for attacking and moving.

Currently as of AoMEX, there is no way to transform a unit without pressing the transform button, which makes it so custom siege weapons in the vein of the Trebuchet from AoE2 have to manually transform to be useable.

This could be circumvented by the addition of a UnitTransformOnAttack and UnitTransformOnMove protounit flags that allow for a unit to automatically transform on attack, and when moving respectively.