First Test

readjson.html is a test to see that the basic d3.js frontend
functions are working, namely, to take JSON and display circles
for rooms.
Images of floorplans.

All images are 1024x1325 pixels.  The fifth floor is positioned so
that if a user switches from one floor to another, the fifth floor
will appear above the east end of the building (where it actually is)
housing.js ready for first test