Global MySQL server

See merge request !19

Add ports to http.redirect()

See merge request !18

Currently does not have the additional feature of labeling and using
the service across runs.

Image.build uses image cache

See merge request !17

This fixes a bug introduced by 8be88413
and hopefully makes Docker inspection a little easier to understand.

Changelog Note:
  `behave_util.docker`:
    - Adds `inspect()` which replaces `Item.inspect()` methods
    - Removes `Item` class
    > Note users will have to replace any method calls to the function.

Add labels on containers

See merge request !15

This reverts commit 9af12dcc, reversing
changes made to 36c9f812.

Enable auto removal of containers on exit

See merge request !14

Delay actual container network connection until creation

See merge request !13

🎉 First package upload to PyPI! 🎉

There is no actual assertion that ShaID types are SHA-256 hex
represenations, but this should at least help identify where ambiguity
exists.

Closes #17

Makes all the arguments after "cmd" keyword-only arguments.

Closes #15

Until Mypy supports the "Self" type (PEP 673) this is the correct way
to type this kind of method.

Closes #14