Merge branch 'master' into namespaced

Merge branch 'master' into namespaced

After some time on the fence, the main SWC repository has returned to
the Python version of this script [1].  This catches the namespace
branch up with everything that's happened along that line of
development since the initial shell work.

[1]: https://github.com/swcarpentry/bc/pull/480

* master:
  swc-windows-installer.py: Add logging
  swc-windows-installer.py: Link to msysGit releases on GitHub
  swc-windows-installer.py: Standardize on 'msysGit' capitalization
  swc-windows-installer.py: Look for an R bin directory
  Add indication that the Windows installer is running
  swc-windows-installer.py: Install the sqlite3 shell
  swc-windows-installer.py: Generalize msysGit download link
  swc-windows-installer.py: Force UNIX-style \n line endings for ~/nano.rc
  swc-windows-installer.py: Use POSIX paths for ~/nano.rc
  swc-windows-installer.py: Use '~' in ~/nano.rc includes
  swc-windows-installer.py: Rename ~/.nanorc to ~/nano.rc
  swc-windows-installer.py: Install nano source syntax highlighters
  swc-windows-installer.py: Quote $PATH export to account for spaces.