First stage in refactoring Bullet: moved Bullet Collision and Dynamics and LinearMath into src folder, and all files in Collision Detection and Dynamics have bt prefix.

Made all buildsystems to work again (jam, msvc, cmake)

Extras/AlgebraicCCD/BU_VertexPoly.h

@@ -19,9 +19,9 @@ subject to the following restrictions:
 
 
 class BU_Screwing;
-#include <SimdTransform.h>
-#include <SimdPoint3.h>
-#include <SimdScalar.h>
+#include <LinearMath/SimdTransform.h>
+#include <LinearMath/SimdPoint3.h>
+#include <LinearMath/SimdScalar.h>
 
 ///BU_VertexPoly implements algebraic time of impact calculation between vertex and a plane.
 class BU_VertexPoly