Cleanup

Removing a couple of data members from the Board constructor since they
weren't used. Fixing a typo in its comments, too.

Removing the script reference to the now-defunct Namespaces.js file from
the HTML. Removing the script reference to Common.js since that isn't
currently in use, even though the file itself still exists.

Sublime Text also seems to update the workspace file on its own so those
changes are getting lumped into this cleanup commit.