Merge branch 'master' into namespaced

This is a no-op merge, explicitly considering and rejecting the
submodules from the master branch.  After this merge, future merges
from the master branch will pick up any content changes.

* master:
  installation-test: Add a submodule with my installation test scripts
  windows-installer: Add a submodule with Ethan's Windows installer
  get-my-ip: Add a submodule with my IP detection script