samples\_directx project file fixes

Fixing "AdditionalLibraryDirectories" and "AdditionalDependencies" in
the project files of SpriteParticles, Surface, TextureFont,
Triangulation, and VBO so that they link. Refactored the others in
_directx for consistency. Important note that Triangulation still
doesn't link for me due to unresolved references to CTwGraphOpenGL
functions.