Add comments to changelog.
Add comments to changelog.

	* ChangeLog: .
	Reinforce pure abstact interface support.
	The data structure are now totally hidden inside
	the library itself and are removed from external inclusion.
	This strategy is not implicit anymore.

	Therefore the template used by abstractRobotDynamics to
	build robots cannot be used anymore as it is contaminant.
	Indeed the impl are just typedef of the internal structure,
	and therefore allow a dynamic cast.

	Please use dynamicsJRLJapan::ObjectFactory as demonstrate
	in the samples to build in the samples.
	OpenHRPVRML file is supported by
	dynamicsJRLJapan::parseOpenHRPVRMLFile.
	Please look at the samples for examples.

Signed-off-by: stasse <dd4a7b9cec481d002886a5f0a808b08ba772748f@aist.go.jp>

jrl-umi3218/jrl-dynamics,jrl-umi3218/jrl-dynamics