FitECM: initial skeleton import
ArvestadBruno1997.symmetrizeP
ArvestadBruno1997.est_eigenvectors
ArvestadBruno1997.est_eigenvectors
ArvestadBruno1997.est_Q
ArvestadBruno1997 tests on random data
Test degenerate inputs to ApproxQ
ApproxQ I/O harness
bring up to modern gsl, batteries, and ocamlbuild