created new Bullet 2 CPU BasicDemo, using the OpenGL 3 rendering. I will add picking soon. Hold ctrl/alt + mouse to move/zoom camera

remove reference to btGImpact (it is removed now)

Demos3/bullet2/BasicDemo/premake4.lua

@@ -0,0 +1,38 @@
+	
+		project "App2_BasicDemo"
+
+		language "C++"
+				
+		kind "ConsoleApp"
+		targetdir "../../../bin"
+
+  	includedirs {
+                ".",
+                "../../../src",
+                "../../../btgui"
+                }
+
+		initOpenGL()
+		initGlew()
+			
+		links{"gwen", "BulletDynamics", "BulletCollision","LinearMath",
+			"OpenGL_Window", "OpenGL_TrueTypeFont"
+		}
+		
+		files {
+		"**.cpp",
+		"**.h",
+		"../../../src/Bullet3Common/**.cpp",
+ 		"../../../src/Bullet3Common/**.h",
+		"../../../btgui/Timing/b3Clock.cpp",
+		"../../../btgui/Timing/b3Clock.h"
+
+		}
+
+	if os.is("Linux") then 
+		links ("X11")
+	end
+
+	if os.is("MacOSX") then
+		links{"Cocoa.framework"}
+	end