option for the Armature Actuator to change the influence of a bone constraint.

Also adds DampedTrackTo to the list of supported constraints in the BGE

Test file:
http://www.pasteall.org/blend/11715

Patch developed as part of a project to NF-UBC Nereus Program.
Development time 'sponsored' by the project.
www.nereusprogram.org

doc/python_api/rst/bge.types.rst

@@ -4518,10 +4518,16 @@ Game Types (bge.types)
 
    .. data:: KX_ACT_ARMATURE_SETWEIGHT
 
-      Change weight of (only for IK constraint).
+      Change weight of constraint (IK only).
 
       :value: 4
 
+   .. data:: KX_ACT_ARMATURE_SETINFLUENCE
+
+      Change influence of constraint.
+
+      :value: 5
+
    .. attribute:: type
 
       The type of action that the actuator executes when it is active.
@@ -4566,6 +4572,12 @@ Game Types (bge.types)
       
          A weight of 0 disables a constraint while still updating constraint runtime values (see :class:`BL_ArmatureConstraint`)
 
+   .. attribute:: influence
+
+      The influence this actuator will set on the constraint it controls.
+
+      :type: float.
+
 .. class:: KX_ArmatureSensor(SCA_ISensor)
 
    Armature sensor detect conditions on armatures.