The proc example application now runs with local Kafka Server

[debasishg]

Exactly the same PR as #20 but for the second application.

This PR does the following:

1. Enables application to run using a bundled kafka local server. This can be controlled through a config entry in application.conf.
2. Changes namespace in config. Had a dcos as a leftover from FDP config.
3. Updates README to include local kafka server based run

[deanwampler]

LGTM, but is the local server code the same as in the DSL example? If so, can we extract into a common subproject? That could be another PR...

[debasishg]

@deanwampler - As discussed in the 1-on-1 call today, I will refactor the repo as follows:

1. Repo 1 : the Scala wrapper library and its tests
2. Repo 2: the http library + 2 sample apps along with embedded Kafka local server. It will have the http library as a separate project (and distributable jar) and the same apps and the local server as 3 separate projects with dependencies.