Release 8.2: Simple case insensitive dictionaries

Release 8.1: Improved output capturing

Release 8.0: Make spinners more flexible, adopt deprecated imports

The work on spinners was prompted by the following:
xolox/python-executor#2

Everything else was me going mad on a refactoring spree 😇

Release 7.3: Support for deprecating positional arguments

Release 7.2: Support for deprecated imports

Release 7.1.1: Restore Debian/Ubuntu Python 3 compatibility (distutil…

…s.spawn)

Release 7.1: Enable Windows native ANSI support

Release 7.0: Enhancements, bug fixes, Python compatibility updates

This contains xolox#24, xolox#32, xolox#33, xolox#35, xolox#36 and some changes of my own.

Release 6.1: Add Sphinx :pypi:`...` role

Release 6.0: Enable custom shell script code in MockedProgram