brain anatomy & function recording

The worldfile revision has been turned up to 11 and now allows run-time enabling of brain anatomy and function (neural activity) recording. Recordings can be enabled for all critters turning on brainAnatomyRecordAll and brainFunctionRecordAll (in the worldfile). Recordings of the best-so-far, based on Polyworld's heuristic fitness function, can be enabled at a desired frequency (in time-steps), by setting bestSoFarBrainAnatonomyRecordFrequency and bestSoFarBrainFunctionRecordFrequency to the desired number of time-steps between archived recordings. (All non-archived recordings are deleted, when used in this "bestSoFar" mode.)