add basic concept demo, Coordinate System for a start.

set the up axis for some of the demos.

Demos3/bullet2/FeatherstoneMultiBodyDemo/BulletMultiBodyDemos.cpp

@@ -55,6 +55,7 @@ m_pickedConstraint(0),
 m_pickingMultiBodyPoint2Point(0)
 
 {
+	app->setUpAxis(1);
 	m_collisionConfiguration = 0;
 	m_dispatcher = 0;
 	m_broadphase = 0;