local test setup

[pradykaushik]

We need a way to test elektron without having to setup the mesos cluster.
Docker compose seems a good approach as spinning up docker containers is much faster than spinning up a virtual machine.
Couple of things to consider here.

Mesos agent container needs to have performance copilot installed. This can be done by layering on top of rdelvalle/mesos:1.5.1.
Elektron needs to be containerized and requires pmdumptext to be installed.

[pradykaushik]

pull request #15 under review.