Orange custom widget

Question

I am trying to get the example given in http://orange-development.readthedocs.org/tutorial-cont.html for working in Orange 2.7. However, although I can test my widget from the Python shell, I cannot get my own widget that I create to display in the Orange Canvas GUI. All I see is a demo bar that has nothing in it. I used pip install -e to install this package, and I see that the link was created in PATH_TO_PYTHON2.7 / site-packages /

Any suggestions?