Emit an error when a relationship's DAO is not found.
First iteration of automatic testing.

Tests are all passing except for the Context Examples test.

I think there are two problems with this, actually:
1. In the original master, created on the web, the context's toString()
   wasn't called properly, and it output "m1.X [object Window]".
2. In the result from Node, the m2.X is "DEFAULT WINDOW", when it should
   be "Y", and m1.X is "DEFAULT WINDOW", which is probably correct but
   doesn't match the web version as noted above.

I'm checking in the automated testing, even though things aren't
passing, because it seems like the testing framework is working
properly.