Improved simple example, where now also the second parameter is used to generate better classNames.
version bump
Don't recursively process values with a toCSS function

stylesToCSS has code to run the toCSS function on a value if it exists,
but createStyle method will try to recursively process the object first.
Don't add px to unitless numbers
Quote the value of the content property

Only automatically quote the value of the content property if it is not
a valid unquoted value, as defined by
https://developer.mozilla.org/en-US/docs/Web/CSS/content.

Test plan: jest
Merge pull request #74 from ianobermiller/tocss

Don't recursively process values with a toCSS function
Merge pull request #75 from ianobermiller/unitlessnumber

Don't add px to unitless numbers
Merge branch 'master' of https://github.com/js-next/react-style into quote-content

Conflicts:
	lib/stylesToCSS.js
Merge pull request #77 from ianobermiller/quote-content

Quote the value of the content property