Added a method to get the play position of current frame from a video file.
Added a method to get the play position of current frame from a video file.

Similar to getFrameNumber(), this method gets the time of the latest frame being processed or obtained from the video source
hayd/SimpleCV,gskielian/SimpleCV,jlegendary/SimpleCV,onaclovtech/SimpleCV,jyt109/SimpleCV,jyt109/SimpleCV,jyt109/SimpleCV,hurdlea/SimpleCV,jlegendary/SimpleCV,nils-werner/SimpleCV,hayd/SimpleCV,tpltnt/SimpleCV,sightmachine/SimpleCV,tpltnt/SimpleCV,gskielian/SimpleCV,hurdlea/SimpleCV,jlegendary/SimpleCV,nils-werner/SimpleCV,beni55/SimpleCV,jyt109/SimpleCV,gskielian/SimpleCV,sightmachine/SimpleCV,beni55/SimpleCV,sightmachine/SimpleCV2,hayd/SimpleCV,tpltnt/SimpleCV,hurdlea/SimpleCV,nils-werner/SimpleCV,jlegendary/SimpleCV,onaclovtech/SimpleCV,jlegendary/SimpleCV,beni55/SimpleCV,jyt109/SimpleCV,onaclovtech/SimpleCV,sightmachine/SimpleCV2,beni55/SimpleCV,sightmachine/SimpleCV2,hayd/SimpleCV,hayd/SimpleCV,nils-werner/SimpleCV,gskielian/SimpleCV,onaclovtech/SimpleCV,tpltnt/SimpleCV,tpltnt/SimpleCV,beni55/SimpleCV,hurdlea/SimpleCV,sightmachine/SimpleCV,nils-werner/SimpleCV,hurdlea/SimpleCV,sightmachine/SimpleCV,sightmachine/SimpleCV,sightmachine/SimpleCV2,onaclovtech/SimpleCV,gskielian/SimpleCV