Clarify JupyterHub and Jupyter description in component readme

[willingc]

• Add reference to Project Jupyter a non-profit open source academic research project
• Edit text and links related to Jupyter, JupyterLab, and JupyterHub
• Correct minor typos and grammar

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This change is 

[jlewi]

/lgtm
/approve

[jlewi]

@willingc Thank you. Can you please resync the files got out of date.

[jlewi]

@willingc If you'd like your non-profit to be listed as one of the participants in Kubeflow (e.g. in slides like this

Just let myself and/or @aronchick know.

[jlewi]

/ok-to-test

[willingc]

@willingc If you'd like your non-profit to be listed as one of the participants in Kubeflow (e.g. in slides like this

Just let myself and/or @aronchick know.

Thanks @jlewi. It would be nice to add Project Jupyter as a non-profit participant.

cc @minrk @yuvipanda @ellisonbg @fperez

[jlewi]

@willingc Updated the slides.

Can you please resync when you have a chance files got out of sync again?

[willingc]

Thanks @jlewi for the update.

Is there a particular workflow that you recommend to avoid the resyncs?

[jlewi]

/test all

[jlewi]

/lgtm

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[jlewi]

@willingc I think the resyncs were the result of our GitHub repo being misconfigured; se kubeflow/community#28. But It should be fixed now.