This feature is obselete for a while and no used by anybody. Stop the support.

* [parsers][srdf][neutralConfiguration] Update verbosity. If found, display joint and value. If not found, display error message. Don't display both.

* [parsers][srdf][neutralConfiguration] remove ambiguity in name of xml tag and pinocchio::Joint joint instance

* [parsers][srdf][neutralConfiguration] Load q0 value for joints with nq>1

* [srdf][unittest][neutralConfig] Add joint state to simple humanoid

* [srdf][unittest] Use simple_humanoid for loading q0.

* [srdf][neutralConfiguration] remove scalar parsing for nq()==1. Simplify Eigen::Map template

As it is done in src/multibody/parser/python.cpp, one can create a shared_ptr to a new Model in c++,
send this into a python namespace, update it in python, and continue to work on the Model in c++.

An example to use this as a simple parser is given in unittest/python.cpp and models/simple_model.py

(squashed version)

[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)

Adapted both the urdf parser and the romeo model to enable romeo inside pinocchio. CAUTION: Romeo is not standard any more and should be corrected, by enabling fixed joint in the urdf parser.