Windows updates for the new versions of SCons

[Doug McCorkle]

Hello,

I have attached a patch that includes the removal of some white space,
removal of a debug print statement for mac, and an update to enable
sca to be used with the newer versions of scons. The last change
requires SCons version 1.3 or greater. Some other things to keep in
mind about the newer versions of SCons:
- MSVS_VERSION is deprecated and should be replaced with MSVC_VERSION
- TARGET_ARCH has to be set before the default environment is built

I am guessing these variables will need to be updated for cppdom and
gmtl.

Doug