Merge remote-tracking branch 'origin/devel' into devel

CMakeLists.txt

include/hpp/manipulation/fwd.hh

include/hpp/manipulation/graph-path-validation.hh

include/hpp/manipulation/graph-steering-method.hh

include/hpp/manipulation/graph/edge.hh

include/hpp/manipulation/graph/graph.hh

include/hpp/manipulation/graph/node.hh

include/hpp/manipulation/manipulation-planner.hh

include/hpp/manipulation/problem.hh

include/hpp/manipulation/weighed-distance.hh

src/CMakeLists.txt

src/graph-path-validation.cc

src/graph-steering-method.cc

src/graph/edge.cc

src/graph/graph.cc

src/graph/node.cc

src/manipulation-planner.cc

src/path-optimization/config-optimization.cc

src/problem-solver.cc

src/problem.cc