fix https://github.com/stack-of-tasks/tsid/issues/93

Olivier Stasse authored Apr 22, 2020 and olivier stasse committed May 12, 2020

 * eiquadprog-fast
 * eiquadprog

Associated tests + integration tests.

As on 16.04, /usr/lib/cmake/eigen3/Eigen3Config.cmake is not giving any.

Otherwise:

…/unittest/eiquadprog-rt.cpp:180:24: error:
call of overloaded 'Matrix(int)' is ambiguous

- remove license headers
- put headers logic in headers subdir
- rewrite test without macros