[CMake] use exports from talos_data

See merge request stack-of-tasks/jrl-walkgen!2

Fix issue #12

Fix #11

TODO:
 * erase dat files when starting tests.
 * Simplify tests/CMakeLists.txt

uses talos_data files by default.

Release of version 4.2.1.

ref https://github.com/stack-of-tasks/pinocchio/issues/849

This is not yet a ros package.

CMakeLists.txt : Add cmake export.

include pinocchio before boost

See merge request stack-of-tasks/jrl-walkgen!1

ref https://github.com/stack-of-tasks/pinocchio/issues/849

This is an intermediate release to test compilation.
Mostly only the first stages are working.
The second stage need further porting.

Did not find a way to automatize the 80 cols policy.