Add capability for sphinx at ReadTheDocs to find bootstrap and actions docstrings

At ReadTheDocs.org, they do not execute the docs/Makefile. Instead, the run sphinx-build directly.   This means that the modules from which we want to pull docstrings must be installed and available in their PYTHONPATH.   This commit includes a script to create a fake module directory which symlinks the client and actions code to .py files and changes to setup.py to add that fake module when in a ReadTheDocs environment.