Add and install from the r channel with conda

Modified to install Apache Toree using pip

(c) Copyright IBM Corp. 2016

Clean apt-get list

Add dockerignores

Added instructions for connecting to spark on standalone mode.

Run `apt-get clean` after installing jq

Use Travis CI

This is done to more explicitly track what version of Debian Jessie is
being used as a base image. It will also ensure that it is properly
updated on the VM even if we forget. This also should help CI and VM
builds stay speedy by using the cache even when there is a newer version
of Debian Jessie. In the long run, we may wish to re-evaluate this
strategy and fix our CI and deployment systems so as to be able to use
the latest version of Debian Jessie with important CVE and other fixes.

Comment to get Mesos for Debian Jessie

Clean conda

Ensure conda works automatically

Webhook to update docker builds page

(c) Copyright IBM Corp. 2016

Add libav-tools for matplotlib animation

(c) Copyright IBM Corp. 2016

(c) Copyright IBM Corp. 2016

Add example for deploying docker-stacks using Docker Compose

(c) Copyright IBM Corp. 2016