Last fixes, contours draw correctly, no clipping

I'm pretty sure there's a bug in opencv with matrices are initialized.
Oh well, fixed that problem on the java end to a small hit in
performance.
TODO:
Add background model algorithm
Grade small shapes on distance from main shape, main shape being
largest, greenest shape
Consider a different but similar algorithm: the user builds the
histogram model by selecting mesh vertices / exclusion points in the 3D
color space by referencing various plant images, could pull in EmguCV /
Winforms personal work for the GUI. Very user friendly