Need to trap try function errors

[darrenarmstrong85]

As a user, errors in experiment function should not impact main flow of my application

Currently errors in experiment functions here will signal to calling code, which should not happen.

For now, just send to logger. In the future we can update this to send the result to a user-supplied error handler of some sort.

Done

Scientist API::

• should not propagate errors when experiment function signals an error
• should send error output to designated logger function