[PatternFly] PatternFly with React and SystemJs

[Stan Silvert]

I want to thank everyone on the PatternFly React team who worked on 
getting out a UMD release of react-core and related packages. This is 
what we needed to make PatternFly React components work on applications 
that use SystemJs.

If anyone wants to see how to get this working, I created a bare-bones 
demo app:

https://github.com/ssilvert/systemjs-react/tree/patternfly-react

The app just displays a simple button from the @patternfly/react-core 
library.  The main thing to look at is the configuration required in 
systemjs.config.js:

https://github.com/ssilvert/systemjs-react/blob/patternfly-react/systemjs.config.js

Stan