cmake+premake disable OpenGL 3 demos on Mac OSX versions below 10.9

See also http://www.bulletphysics.org/Bullet/phpBB3/viewtopic.php?f=9&t=10073
Move ConstraintPhysicsSetup to Demos3/bullet3/ConstraintDemo

Demos3/AllBullet2Demos/BulletDemoEntries.h

@@ -14,7 +14,7 @@
 #include "../bullet2/LuaDemo/LuaPhysicsSetup.h"
 #include "../bullet2/ChainDemo/ChainDemo.h"
 #include "../../Demos/CcdPhysicsDemo/CcdPhysicsSetup.h"
-#include "../../Demos/ConstraintDemo/ConstraintPhysicsSetup.h"
+#include "../bullet2/ConstraintDemo/ConstraintPhysicsSetup.h"
 #include "../ImportURDFDemo/ImportURDFSetup.h"
 #include "../ImportObjDemo/ImportObjSetup.h"
 #include "../ImportSTLDemo/ImportSTLSetup.h"

Demos3/AllBullet2Demos/CMakeLists.txt

@@ -25,8 +25,8 @@ SET(App_AllBullet2Demos_SRCS
 	../../Demos/BasicDemo/BasicDemoPhysicsSetup.h
 	../../Demos/CcdPhysicsDemo/CcdPhysicsSetup.cpp
 	../../Demos/CcdPhysicsDemo/CcdPhysicsSetup.h
-	../../Demos/ConstraintDemo/ConstraintPhysicsSetup.cpp
-	../../Demos/ConstraintDemo/ConstraintPhysicsSetup.h
+	../bullet2/ConstraintDemo/ConstraintPhysicsSetup.cpp
+	../bullet2/ConstraintDemo/ConstraintPhysicsSetup.h
 	../bullet2/FeatherstoneMultiBodyDemo/BulletMultiBodyDemos.cpp
 	../bullet2/FeatherstoneMultiBodyDemo/BulletMultiBodyDemos.h
 	../bullet2/FeatherstoneMultiBodyDemo/MultiDofDemo.cpp

Demos3/AllBullet2Demos/premake4.lua

@@ -50,8 +50,8 @@
 		"../../Demos/BasicDemo/BasicDemoPhysicsSetup.h",
 		"../../Demos/CcdPhysicsDemo/CcdPhysicsSetup.cpp",
 		"../../Demos/CcdPhysicsDemo/CcdPhysicsSetup.h",
-		"../../Demos/ConstraintDemo/ConstraintPhysicsSetup.cpp",
-  		"../../Demos/ConstraintDemo/ConstraintPhysicsSetup.h",
+		"../bullet2/ConstraintDemo/ConstraintPhysicsSetup.cpp",
+  		"../bullet2/ConstraintDemo/ConstraintPhysicsSetup.h",
 		"../ImportURDFDemo/ImportURDFSetup.cpp",
 		"../ImportObjDemo/ImportObjSetup.cpp",
 	 	"../ImportSTLDemo/ImportSTLSetup.cpp",