Clean code and remove unused files.

CMakeLists.txt

include/hpp/fcl/ccd/interval_matrix.h

include/hpp/fcl/ccd/interval_vector.h

include/hpp/fcl/ccd/taylor_vector.h

include/hpp/fcl/eigen/math_details.h

include/hpp/fcl/eigen/plugins/ccd/interval-matrix.h

include/hpp/fcl/eigen/plugins/ccd/interval-vector.h

include/hpp/fcl/eigen/product.h

include/hpp/fcl/eigen/taylor_operator.h

include/hpp/fcl/eigen/vec_3fx.h

include/hpp/fcl/math/math_details.h

include/hpp/fcl/math/matrix_3f.h

include/hpp/fcl/math/matrix_3fx.h

include/hpp/fcl/math/tools.h

include/hpp/fcl/math/vec_3f.h

include/hpp/fcl/math/vec_3fx.h

include/hpp/fcl/simd/math_simd_details.h

include/hpp/fcl/simd/simd_intersect.h