Added travis yml
Remove the compactor/protobuf dependencies from tox.ini
Merge pull request #5 from tarnfeld/feature/travis-ci

Added travis yml
Change master detector API, add example scheduler.

- Updates the master detector API so that it operates on futures, much like
  the mesos core master detector API.  This allows us to have asynchronous
  detectors e.g. ZK-based detectors operate correctly.

- The drivers now call Context.singleton() instead of Context() when being
  initialized without a provided compactor context.  This is to ensure that
  whatever context we use has been started.

- Adds an example scheduler that just prints out offers.

Squashed commit of the following:

commit 0de2c7395719f062b626ae551af85514778ad308
Author: Brian Wickman <wickman@twitter.com>
Date:   Wed Aug 27 15:18:08 2014 -0700

    MesosExecutorDriver should use Context.singleton

commit 2a0b1d280a3c9c6534a2b568162d1f3dce33030c
Author: Brian Wickman <wickman@twitter.com>
Date:   Wed Aug 27 14:12:23 2014 -0700

    Rely upon Context.singleton by default so that context lifecycle can be
    decoupled from driver lifecycle.

commit 3ef35e8e535042566dbdacdfc329630a9d05bfba
Author: Brian Wickman <wickman@twitter.com>
Date:   Mon Aug 25 17:59:52 2014 -0700

    Add example framework.

commit d4a8f4877f27b7cccbccdec257f1f0b30eff6ca3
Author: Brian Wickman <wickman@twitter.com>
Date:   Mon Aug 25 00:41:41 2014 -0500

    Fix registration lifecycle.  Make detector operate on futures.
Allow scheduler implementations using either camelCase or snake_case

Squashed commit of the following:

commit 3c5d17c8c7144b05af4270a171630e2fb2a1c1ae
Author: Brian Wickman <wickman@twitter.com>
Date:   Fri Aug 29 08:44:47 2014 -0700

    Add third_party and third_party/README.rst while we use a divergent tornado.

commit 3bfcd4236c0cfa292ddcab35231d93e24d43aa34
Author: Brian Wickman <wickman@twitter.com>
Date:   Fri Aug 29 08:39:09 2014 -0700

    Add an up-to-date README.rst

commit 6668b99dc7408ba18fea3026e1080ee464c8a84a
Author: Brian Wickman <wickman@twitter.com>
Date:   Wed Aug 27 15:07:06 2014 -0700

    Remove pesos.api and instead rely upon mesos.interface.  Add camelCase delegation.
Merge branch 'master' into feature/zk-detector

Conflicts:
	pesos/detector.py
	pesos/scheduler.py
	setup.py
	tox.ini