Export -DEIGEN_RUNTIME_NO_MALLOC flag for dependency

  function.hh defines EIGEN_RUNTIME_NO_MALLOC variable before including
  Eigen/Core. If a dependency includes Eigen/Core before function.hh, function
  set_is_malloc_allowed turns out to be undefined.
Merge pull request #51 from bchretien/master

Fix ADL error.
Merge pull request #50 from florent-lamiraux/master

Export -DEIGEN_RUNTIME_NO_MALLOC flag for dependency
Set ROBOPTIM_DO_NOT_CHECK_ALLOCATION as a cache variable and forward to pc file

  If this variable is defined at compilation, it has to be defined at
  compilation of dependencies.
Merge pull request #52 from florent-lamiraux/master

Set ROBOPTIM_DO_NOT_CHECK_ALLOCATION as a cache variable and forward to ...
Install missing headers.