Added a function that will make frames that pause a movie

src/MATLAB/+MovieUtils/D3dPause.m

+function movieFrames = D3dPause(numPauseFrames)    
+    D3d.Update();
+    movieFrames = D3d.Viewer.CaptureWindow();
+    
+    movieFrames = repmat(movieFrames,1,1,1,numPauseFrames);
+    
+end
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