minor changes to imageProcessor.processImage(). Also made all methods in
ImageProcessor class public for ease of testing. Created cpp file for
test ImageProcessor class using assertions
Began creating unit tests for the ImageProcessor class. Also refactored code
for drawImageInterface and its subclasses to have drawPic() to take a Drawing
class object instead of a single line, also refactored main method to suit
this change.
Mergined with Josh