Should add a way in the amod gactar config section to set a random number seed.

Probably need a couple of options:

• set a seed from random source (something like random.seed(datetime.now()) in Python)
• set a specific seed

In vanilla, the default if :seed is not specified is (pg. 189):

There is no default value for the seed parameter. When the module is created in a model it generates
a new seed based on the current result of get-internal-real-time.

For models involving randomness, I'm not sure if it's possible to make results consistent across frameworks since they are using different RNGs.