Merge branch 'master' into public/combinat/rigged_configurations/bijections-13872

* master:
  [FIXUP] 5.13.beta5: update git specific files
  5.13.beta5
  5.13.beta5
  #14410: let ATLAS build shared libs on Cygwin.
  Trac #15385: cleanup of hadamard matrices
  Trac #15174: permutations multiplication order made more explicit and less of a minefield; also other fixes to permutation.py
  Trac #13849: deprecate degrevlex
  Trac #9411: review patch (minor details)
  Trac #9411: lll_reduce for elliptic curves over number fields
  Trac #11628: cache factored order in FiniteField_base
  Trac #10132: Parametrization of (metric) surfaces in 3D Euclidean space
  Trac #15079: unique_round for RIF
  Trac #11868: Big PARI fix: reviewer patch
  Trac #11868: remove workarounds for bug related to global GEN variables
  Trac #11868: eliminate global GEN variables
  Trac #15453: Wrap IML calls in sig_on()
  Trac #8793: minor clean of logic/boolformula.py
  Trac #15078: finite state machines, automata, transducers
  Trac #13848: mq.SR: use deglex and polybori (if GF(2)) by default

Author: Travis Scrimshaw