Cpymad

- make sequence.elements.index more convenient: can now handle names with or
without the ':d' suffix as well as the special names 's' and 'e'

- fix ``ValueError`` on CERN SWAN jupyter instances due to treating stdout
as binary stream (125)

- remove unused ``error_log`` from ``Madx``
- support passing arbitrary callables to ``Madx(stdout=...)``
- support passing non-file ``IOBase`` objects as ``stdout``
- default to ``sys.stdout``
- can pass almost arbitrary MAD-X scripts to ``input``, including
comments/multiline commands

- drop support for 32bit
- drop support for python 2.7
- deprecate python 3.5
- link windows binaries against UCRT (like the official python binary)

- update to MAD-X 5.08.01

- replace -flto by -fno-lto in .github/build/manylinux1/cpymad.sh causing segfalt in makethin (see https://github.com/hibtc/cpymad/issues/67)