Adding initial visual studio 2013 support.  Not yet complete.
Visual studuio 2013 support now functional.
Fixed project dependencies.
Fixed missing dungeon.pdf from makedefs cleanup.
Adding gitignore file to root of repository.
Added missing dlb process which creates nhdat file.
Added post nethack build process to populate results directory with
defaults.nh, guidbook.txt, license and nethack.txt.
Added new project to build console based nethack.  Moved window based
nethack build to nethackw project.
Added build of nhdefkey.dll.
Fixed bug in get_scr_size() where it was calculating the width and
height of the screen incorrectly.

Fixed dependency for nhdefkey.
Added include files to project files.