ref. https://github.com/stack-of-tasks/eigenpy/pull/205

As HPP relies on Pinocchio since 2 years, it seems natural to remove the dependency.
Check and benchmark are no more meaningfull.

[C++][CMake] Merged fake-fcl with fcl.hpp (splitted in .hpp and .hxx file). Propagated flag -DWITH_HPP_FCL to all binaries

[C++][Python] One can contruct a GeometryModel and Data even if hpp-fcl is not found. All stuff related to collisions is not available but geometryPlacements are ( for visualisation in the viewer especially).

By default, one can now build the benchmarks from make timings. They
are build along with the lib if BUILD_BENCHMARK is set to ON.

Added missing licenses, corrected compilation bug in python/parsers.hpp. also modified the number of benchmarks to have more relevant results and removed useless lines

[bench][unittest] Reworked the comparison test between pinocchio and hpp : more tests for benchmarks along with functional tests ; removing magic paths to urdf models + modification of romeo urdf model. Also added a specific BUILD_TESTS_WITH_HPP cmake variable. If you want to run tests that execute hpp robot loading, be sure to have the package romeo_pinocchio installed (it is just a package done done by hand for the moment)

[benchmark] Added benchmark of atomic computations with geometry objects such as updating global positions, determine if two objects are in collision, or compute the distance between two objects

[cmake][C++][bug fix] Moved initialization of static const variable gravity 981 from model.hpp to model.cpp. libpinocchio.so is no more empty. Caution : Pinocchio is more a header-only library. One should alwais link against shared library