nomore py/deprecated

[RonnyPfannschmidt]

• drop pylib
• drop deprecated code
• reenable vagrant test

[RonnyPfannschmidt]

moving this to draft, i'l lbe using git machete to split out more pull requests and syncing with them

[bluetech]

I've picked some of the changes to master in #188. You can find the remaining changes rebased on master here: https://github.com/bluetech/execnet/commits/ronny-changes-2

[RonnyPfannschmidt]

@bluetech thanks for tackleing this, ill fetch the details later

[nicoddemus]

@RonnyPfannschmidt I think this is no longer relevant?

[RonnyPfannschmidt]

Theres some stuff not merged

I need to sort that out eventually