A_FireCustomMissile transfer tranlsation flag

[jpalomo]

I reworked the 6th argument for [wiki]A_FireCustomMissile[/wiki] (bool aim) to a flags field, and added a flag to enable the translation to be transferred from the actor calling the function to the missile. This shouldn't break any existing mods that used the argument for it's original purpose (hopefully). Player colored missiles are now possible.

Edit:
Removed file.