Add Error Simulation to the Core

Currently, running error experiments on the frontends exhibits weird behavior because the core only supports perfect (volume/2) splits.

It should be possible to specify the error profile of an entire session (or perhaps individual split calls) in the frontends, and have the Core exhibit that behavior.

Example: I want the split error factor to be drawn from N(1, 0.01). When I go to split a 1 volume droplet, and draw 1.2 as the error factor, both the frontend and backend should now see a droplet with volume=0.6 and a droplet with volume=0.4 (see https://github.com/michalpiszczek/puddle/blob/error/src/python/examples/error_dilution.py for the frontend behavior).

Notes:

One quick way to do this is having expected volumes be a parameter on split calls, and the Core will simply assume those passed values are correct and assign them to the resulting droplets.
Gaussian error should be sufficient.
Perhaps we should simulate error for input() as well.

uwmisl / puddle

Add Error Simulation to the Core #30