This reverts commit 740f1878.

This reverts commit d6436ffc.

Conflicts:

	src/hppPlanner.cpp
	src/hppProblem.cpp

	* include/hppCore/hppPlanner.h: remove using namespace std,
	* src/hppPlanner.cpp: clean-up.

  hpp-model 1.8 -> 2.0

    When building a robot with Kineo parser, the construction of the dynamic
    part of the kinematic chain is delayed. Calling this functions triggers
    construction of the kinematic chain.

    ChppBody -> hpp::model::Body.

	ChppBody -> hpp::model::Body.

       ChppPlanner -> hpp::core::Planner,
       ChppProblem -> hpp::core::Problem,
       ChppColPair -> hpp::core::CollisionPair.

     * CMakeLists.txt.

	* CMakeLists.txt,
	* NEWS.

    * include/hpp/core/planner.hh,
    * src/hppPlanner.cpp: additional tags are declared by creating an object of
      type hpp::core::Parser.

	* CMakeLists.txt,
	* NEWS.

    * include/hpp/core/collision-pair.hh,
    * include/hpp/core/planner.hh,
    * include/hpp/core/problem.hh,
    * include/hppCore/hppColPair.h,
    * include/hppCore/hppPlanner.h,
    * include/hppCore/hppProblem.h.

     * src/humanoid-robot.cc.

    * src/freeflyer-joint.hh,
    * src/joint.hh,
    * src/rotation-joint.hh,
    * src/translation-joint.hh.

	* include/CMakeLists.txt,
	* src/CMakeLists.txt: include priorly local headers,
	* src/hppColPair.cpp: include new headers,
	* src/hppPlanner.cpp: include new headers,
	* src/hppProblem.cpp: include new headers.

       * src/hppProblem.cpp.