GUI Update

This Java program now allows users to click on the image which they have browsed for and allows them four clicks which will then populate the Corner A-D (X,Y) coordinates.  Eventually this program will be able to use lists of the yellow, red, and magenta points to fill in the Corner A-D (X,Y) coordinates for the user by having them click as close to the colored pixel as possible and then filling in the closest pixel in the corresponding color's list.  Also there will be multiple images which pop up that will contain the stream outline (magenta pixels), and another image which will hold the control points (red pixels) and the square corner points (yellow pixels).