Updated README.md - Add additional introductory paragraph

[frankstepanski]

What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)

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[frankstepanski]

Updated introductory paragraph to README for further clarification of how Angular works.

[googlebot]

CLAs look good, thanks!

[googlebot]

CLAs look good, thanks!

[gkalpak]

I feel this goes into a bit too much detail for this high-level description here.
Maybe incorporate it into the Interconnection with HTML at the root level section below (or in it's own section).

[gkalpak]

Also, please, wrap lines at 100 characters max 😃

[Narretz]

@frankstepanski Can you incorporate the changes @gkalpak requested? Otherwise we'll have to close this PR.

[frankstepanski]

Sorry, missed this...will incorporate it his weekend. thanks.

[frankstepanski]

Updated

[gkalpak]

I tweaked it a bit and merged. Thx!
_{(I also seized the opportunity to limit all lines to 100 chars 😁)}

[frankstepanski]

Thanks!