[GameEngine] Commit all Kester's changes made to the gameengine to restore 2.25 like physics.

[SCons] Build with Solid as default when enabling the gameengine in the build process
[SCons] Build solid and qhull from the extern directory and link statically against them

That was about it.

There are a few things that needs double checking:

* Makefiles
* Projectfiles
* All the other systems than Linux and Windows on which the build (with scons) has been successfully tested.

source/gameengine/Ketsji/KX_PhysicsObjectWrapper.cpp

@@ -40,8 +40,10 @@
 
 KX_PhysicsObjectWrapper::KX_PhysicsObjectWrapper(
 						PHY_IPhysicsController* ctrl,
-						PHY_IPhysicsEnvironment* physenv,PyTypeObject *T)
-: m_ctrl(ctrl),m_physenv(physenv),PyObjectPlus(T)
+						PHY_IPhysicsEnvironment* physenv,PyTypeObject *T) :
+					PyObjectPlus(T),
+					m_ctrl(ctrl),
+					m_physenv(physenv)
 {
 }