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.
Merge branch 'python'

Pull in recent changes to the install script, especially the license
and README (now that we're a stand-alone repository).

* python:
  README.md: Copy the docstring into a README
  swc-windows-installer.py: Fix 'swc_windows_installer.py' -> hyphens
  swc-windows-installer.py: Change '~/nano.rc' to 'a ~/nano.rc'
  swc-windows-installer.py: Canonical SQLite capitalization
  COPYING: Add the full text of the MIT license
README.md: Update usage for folks running the compiled installer

With the Inno installer, there's no need to download Python or msysGit
ahead of time.  Also, folks who aren't building their own installer
can use the latest compiled release.  I'm not sure how the compilation
process works, so I'll leave that for Ethan to fill in.