Create Trackable.wurst

Little package with easy functions, and some features:
- Create a trackable for some specific player
- Get the current trackable position
- Get the model path of the trackable
- Get the owner of the trackable, if created just for one player   
This package is maybe a bit to special, but in my eyes the natives are just to limited, so i added the features.
I know there is a problem with the last function, because if u write in the trigger action:
GetHandleID(GetTriggeringTrackable()) the ID you get is wrong.
I will add a extra function for getting the right one.