Making the _width and _height fields from FastBitmap readonly
Improving FastBitmap and implementing memcpy in its usage
Unrolled loop in the Transparency filter code
Fixing bug on ImageUtilities.FindMinimumImageArea() with single opaque pixel images
Adding trace image bounds calculation for faster rendering times on the BasePencilOperation
Refactoring paint operations to separate files and fixing bug in SelectionPaintOperation