Pull request for adding build support.

I have maintained the original directory name scheming with this pull request which included spaces.

Supports building a 3.5" .hdv disk image and two 5.25" .nib disk images.  For the 3.5" version, I compared the output from my build system and compared to the originally released version.  I have even documented the differences encountered to explain the inaccuracies.  For the 5.25" version, I only care that the output is playable.  I have made no attempt to determine how closely the bits produced match what is found on the originally released version.  I do know that there are differences such as the source files still being configured for the 3.5" version which happens to disable the copy protection amongst other things.

Enjoy!