Sync docs in README.md and Getting Started.md, and link to further documentation

    README and Getting Started were similar docs, but contained some
    differences.

    This patch largely syncs the docs between them.

    Also, neither document was linking to the two additional docs/
    directory. Now both docs links to the additional documentation.
Merge pull request #57 from markstos/master

Sync docs in README.md and Getting Started.md, and link to further documentation