Diagnostics patch + ecology reference added.

We just set a small patch live. This contains two changes:

• We added a small diagnostics tool. It has to be run manually by a user to do anything. Running it will create two text files that contain information about Creatures-related registry entries on the computer.

As part of resolving technical issues we may ask a user to run this tool and send us the contents of the files it creates.

• Owners of Creatures 3 will find a new file in the "Documents" folder called "Ecology Reference.pdf". It's a handy reference for those of you wish to learn more about how the ecology in the four terrariums work and the agents that are part of it.