Added dynamic updating of Anisotropic filtering.
Added Cvar_IsModified() function.
Refactored screen and HUD scaling functions.
Added text size to string drawing functions.
Added textSize field to menu items for submenu headers.
Fixed compiling on MSVC6.
Renamed TextColor() and CL_StringSetParams in cl_string.c to CL_TextColor() and CL_StringSetParams().
Changed SetWindowLong() and GetWindowLong() calls in vid_dll.c to SetWindowLongPtr() and GetWindowLongPtr().