Split up the code for the evolve management command.
The evolve command was one large, complicated function with a scattering

of variables, some of which overwrote others.
This cleans it up a little bit by taking the big chunks of logic and

placing them in their own functions. Several of the common variables are

also now member variables.
It also stops using the print statement for output, and now uses

self.stdout.write.

Tried all the major options to the evolve command. Didn't hit any problems.

The evolution, hint, and SQL output looked correct.