Add scripting support

[bemug]

I'm using stint for my script and needed to expand it a bit.
My main usage is waiting in bash till a pixel (or more) switch to a specific color, and then perform an action.
For this I introduced a way to specify where I want stint to grab the color from.

This looks like something like this:

while [ "$(stint-x $X -y $Y)" != "$COLOR" ]                      
do                                                                                  
    sleep 1                                                                     
done
echo "Color found"
#Perform specific action (example: perform a click with xdotool)

To ease the finding of X and Y position, I added also added a way to display which position stint grabs the pixel from, so that I can do it once with my mouse using stint -s, click on the matching pixel, grab the position and the color and pass it to my script.

None of these change the default behavior.

[bemug]

Bump