C++: Attempt to get dwtestoo working with old pre-lambda compilers. Fixed a number of errors regarding this from the last commit, however... GCC 4.2 errors out complaining about forward declaration of class Pixmap. This forward definition is necessary to define some classes that reference each other. The issue seems to be these old GCC implmentations expect... that these classes be defined in different files. Since I forward declare Pixmap before defining Render which uses it, then when I go to define Pixmap, it is already forward declared and gives errors. This code is legit, but the compiler implementation is erroring out.... Not sure how to fix this right now without defining them in separate files.

# Set these here to change the version for all platforms
DW_MAJOR_VERSION=3
DW_MINOR_VERSION=3