Fix: Copy CodeChat.css when CodeChat is enabled.
Docs: Update notes in conf.py.
      Tune Sphinx default params to produce nicer output (no sidebar)
        when viewed in Enki.
Fix: Get PyInstaller builds working on Linux.
     Add a run-time hook to deal with PyInstaller Linux bug.
     Simple shell script to build on Unix.
Fix: When frozen on Linux, extend search path to include directory in which
       the frozen bianry runs.
     Correct names for Sphinx and Enki on both Linux and Windows.