COPYING: Add the full text of the MIT license

Downloaded from http://opensource.org/licenses/mit-license.html, with
the year from our first commit and a generic author identifier.  For a
full list of copyright holders, see the version control history.
swc-windows-installer.py: Canonical SQLite capitalization

We might as well match the upstream capitalization conventions.
swc-windows-installer.py: Change '~/nano.rc' to 'a ~/nano.rc'

I think the comment reads more clearly with the article.
swc-windows-installer.py: Fix 'swc_windows_installer.py' -> hyphens

Match our local script name in the instruction comment.
README.md: Copy the docstring into a README

And add Markdown links for all the packages we reference.  This gives
folks hitting the repository a more traditional welcome.