[NTVDM]
Code organization:
- Create directory hardware/video where to put all video emulation (VGA currently, and maybe other things in the future);
- Create directory hardware/sound where to put all sound emulation (PC speaker currently, and maybe other things in the future);
- timer.c/h --> pit.c/h;
- Adjust the necessary includes and the cmakefiles;
- Remove unneeded includes;
- NTVDM is allowed to have its own VS project ^^

git-svn-id: svn://svn.reactos.org/reactos/trunk/reactos@65430 97493ccd-5924-5043-b1f5-66cb403b36ce