Update README.md

[sympmarc]

Minor grammar fixes.

Also, is this still true? "Despite being ReactJS exclusive,..."

Nort sure what this sentence means: "HTML/CSS documented components serve no other longevity than any other framework."

[juliemturner]

Yes, still only ReactJS... I can't say that I understand that sentence either... @StfBauer ?? Otherwise this could be merged.

[sympmarc]

I asked about the ReactJS line because further down you give links to an Angular example. At the very least, I find it confusing.

[juliemturner]

I think someone started Angular but then it didn't go anywhere, so yeah that needs to be amended... @StfBauer do you know the status of the Angular initiative...

[StfBauer]

Thank you, @sympmarc for the updates.