+ bugfix in btAlignedObjectArray, not calling destructors on resize to smaller array.

Thanks Benoit for pointing this out, and bugfix: http://code.google.com/p/bullet/issues/detail?id=218

+ Added point to point, hinge, slider and generic 6dof constraints to Maya Dynamica plugin
Thanks to Herbert Law for the constribution: http://code.google.com/p/bullet/issues/detail?id=221

Extras/MayaPlugin/rigid_body_impl.h

@@ -27,6 +27,7 @@ Written by: Nicola Candussi <nicola@fluidinteractive.com>
 #define DYN_RIGID_BODY_IMPL_H
 
 #include "mathUtils.h"
+#include "constraint/bt_constraint.h"
 
 class rigid_body_impl_t
 {
@@ -55,6 +56,10 @@ public:
     virtual void apply_central_force(vec3f const& f) = 0;
     virtual void apply_torque(vec3f const& t) = 0;
 
+	virtual void update_constraint() = 0;
+	virtual void add_constraint(bt_constraint_t* constraint) = 0;
+	virtual void remove_constraint(bt_constraint_t* constraint) = 0;
+
 public:
     virtual ~rigid_body_impl_t() {};
 };