GetScreenshots - bash screencapture from matlab with various user-settings

Start screencapture.sh from within matlab, with user-defined parameters (delay, number of shots)

This function calls a bash script which acquires screenshots in the background while matlab continues working.
The matlab script creates the bash-script first with user-defined parameters (or default settings), and after calling it, returns the path and name of the bash script.
Images are saved with consecutive numbering to a predefined folder.
I find this useful when running a fullscreen matlab display, which I want to capture at different times during presentation.
Written and tested so far only in Matlab 2009.