MasterGraphicEx

This is an extension of the MasterGraphic in the MasterX SDK. With MasterGraphicEx, you can convert to grayscale, to complement, darken, brighten, scale, clip to a rectangle and balance the color. This adds a lot of functionality to MasterGraphic. Note that for this to work, you need to define MasterGraphic's private section as protected. I modified MasterX.cpp a little because it was crashing too much, but that should have no consequence to implementation of MasterGraphicEx.