Note Windows support in README

[Arithmomaniac]

Now that we have Windows wheels for jq, the following lines should probably be updated:

jq.py/README.rst

Lines 10 to 18 in 9f76581

	Wheels are built for various Python versions and architectures on Linux and Mac OS X.
	On these platforms, you should be able to install jq with a normal pip install:
	.. code-block:: sh
	pip install jq
	If a wheel is not available,
	the source for jq 1.8.1 is built.