[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/GameLogic/SCA_AlwaysEventManager.cpp

@@ -45,8 +45,8 @@
 using namespace std;
 
 SCA_AlwaysEventManager::SCA_AlwaysEventManager(class SCA_LogicManager* logicmgr)
-	: m_logicmgr(logicmgr),
-	SCA_EventManager(ALWAYS_EVENTMGR)
+	: SCA_EventManager(ALWAYS_EVENTMGR),
+	m_logicmgr(logicmgr)
 {
 }