sdl usage standards proposal 3:

again maintains fallbacks for folks that just don't want to use the lib (though if we do want to go that route, we'll likely want to re-review a few commits and put fallbacks, well, *back* at some point)
includes sdl in torqueconfig.h if in use to kill duplication.
adds a generic sdlPlatform.cpp for general methods, oneliners, and the like

Engine/source/platformWin32/winWindow.cpp

@@ -511,6 +511,7 @@ F32 Platform::getRandom()
    return sgPlatRandom.randF();
 }
 
+#ifndef TORQUE_SDL
 ////--------------------------------------
 /// Spawn the default Operating System web browser with a URL
 /// @param webAddress URL to pass to browser
@@ -585,6 +586,7 @@ bool Platform::openWebBrowser( const char* webAddress )
 
    return( true );
 }
+#endif
 
 //--------------------------------------
 // Login password routines: