add improved btGeneric6DofSpring2Constraint, thanks to Puhr Gabor and Tamas Umenhoffer!

improved the new demo testbed (work-in-progress)
add basic Lua demo, import URDF test, STL import, obj import

Demos/CommonParameterInterface.h

@@ -36,6 +36,8 @@ struct CommonParameterInterface
 	virtual void registerSliderFloatParameter(SliderParams& params)=0;
 	virtual void syncParameters()=0;
 	virtual void removeAllParameters()=0;
+    virtual void setSliderValue(int sliderIndex, double sliderValue)=0;
+
 };
 	
 #endif //PARAM_INTERFACE_H

Demos/SerializeDemo/SerializeSetup.cpp

@@ -0,0 +1,21 @@
+#include "SerializeSetup.h"
+#include "../Extras/Serialize/BulletWorldImporter/btBulletWorldImporter.h"
+
+SerializeSetup::SerializeSetup()
+{
+    
+}
+SerializeSetup::~SerializeSetup()
+{
+    
+}
+    
+void SerializeSetup::initPhysics(GraphicsPhysicsBridge& gfxBridge)
+{
+    this->createEmptyDynamicsWorld();
+    gfxBridge.createPhysicsDebugDrawer(m_dynamicsWorld);
+    m_dynamicsWorld->getDebugDrawer()->setDebugMode(btIDebugDraw::DBG_DrawWireframe);
+    btBulletWorldImporter* importer = new btBulletWorldImporter(m_dynamicsWorld);
+    const char* filename = "testFile.bullet";
+    importer->loadFile(filename);
+}

Demos/SerializeDemo/SerializeSetup.h

@@ -0,0 +1,14 @@
+#ifndef SERIALIZE_SETUP_H
+#define SERIALIZE_SETUP_H
+#include "../../Demos/CommonRigidBodySetup.h"
+
+class SerializeSetup : public CommonRigidBodySetup
+{
+public:
+    SerializeSetup();
+    virtual ~SerializeSetup();
+    
+	virtual void initPhysics(GraphicsPhysicsBridge& gfxBridge);
+};
+
+#endif //SERIALIZE_SETUP_H