Allow README examples to be copy/paste-able

When going through the README I found that I had to modify the code a bit to get it to work.  So here are the changes I've made to allow you just to copy/paste from the README.

Also, I've modified run-local! to return the result of the DRPC.  I found that helpful to ensure that the topology and DRPC are working properly as well as it allowed me to play around with different inputs and see their respective results.