Modify README.md to confirm to new template

* updates README's formatting to confirm to new PL module standard
* Created TOC linking to major headings in README to enhance readability,
enable a user to find what they need quickly, and to act as a document
guide.
Minor cleanups on top of README.md template change

* Remove .DS_Store from commit as we don't want mac directory metadata files
committed to the repository.
* Removed now irrelevant README_GETTING_STARTED.md as that content is now
merged and thus duplicated in README.md.
* Whitespace cleanups in README.md: trailing spaces, made soft wraps the
standard.
* Replaced instances of 'include' with the 'class' format.
* Fixed Release Notes to reflect the notes from the Forge

Signed-off-by: Ken Barber <ken@bob.sh>
Merge branch 'ticket/master/new_readme'

* ticket/master/new_readme:
  Minor cleanups on top of README.md template change
  Modify README.md to confirm to new template