WIP:  Added initial Dockerfiles for batfish client and server

Work in progress until I get access to LogicBlox.  Putting up pull request for visibility.

Adding two Dockerfiles for batfish client and server.  The batfish client should work by passing -e flag to docker commands but I won't be able to test it until I finish the server (needs LogicBlox).

still a WIP:  we need to experiment with how we connect to instances of the server.