replace namespace se3 with pinocchio

CMakeLists.txt

README.md

bindings/CMakeLists.txt

bindings/python/CMakeLists.txt

bindings/python/__init__.py

bindings/python/constraint/constraint-bound.cpp

bindings/python/constraint/constraint-bound.hpp

bindings/python/constraint/constraint-equality.cpp

bindings/python/constraint/constraint-equality.hpp

bindings/python/constraint/constraint-inequality.cpp

bindings/python/constraint/constraint-inequality.hpp

bindings/python/constraint/expose-constraints.hpp

bindings/python/contacts/contact.cpp

bindings/python/contacts/contact.hpp

bindings/python/contacts/expose-contact.hpp

bindings/python/formulations/expose-formulations.hpp

bindings/python/formulations/formulation.cpp

bindings/python/formulations/formulation.hpp

bindings/python/module.cpp

bindings/python/robots/expose-robots.hpp