[requires workspace rebuild due to added directory]

replace ONCE with direct calls to ScriptingInit in simulation/network
code as well.
note: GameSetup is now responsible for calling ServerSession's init
instead of Server doing it

added simulation/scripting with a module that takes care of all
scripting init (reduces CCD)

This was SVN commit r5883.

source/simulation/scripting/SimulationScriptInit.h

@@ -0,0 +1 @@
+extern void SimulationScriptInit();