Crash bug when "mesh" applied twice fixed

Constraints reworked - all of them could now work with one or two bodies

Modification of constraint frames and initial positions of rigid bodies
now allowed at start frame only

Plugin version is set to 2.76

Extras/MayaPlugin/rigidBodyNode.h

@@ -18,6 +18,9 @@ not be misrepresented as being the original software.
 3. This notice may not be removed or altered from any source distribution.
  
 Written by: Nicola Candussi <nicola@fluidinteractive.com>
+
+Modified by Roman Ponomarev <rponom@gmail.com>
+01/22/2010 : Constraints reworked
 */
 
 //rigidBodyNode.h
@@ -62,6 +65,7 @@ public:
 public:
 
     rigid_body_t::pointer rigid_body();
+    void update();
     
 public:
 
@@ -88,7 +92,6 @@ public:
     static  MString     typeName;
 
 private:
-    void update();
     void computeRigidBody(const MPlug& plug, MDataBlock& data);
     void computeWorldMatrix(const MPlug& plug, MDataBlock& data);
     void computeRigidBodyParam(const MPlug& plug, MDataBlock& data);