Update stacks to current conda, python3.5, and add h5py

Fix letsencrypt in make-deploy example.

(c) Copyright IBM Corp. 2016

Stop the ubuntu base image from surfacing at the top level of github

Fix py4j version and path

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Bump to Spark 1.6.0 with Apache Toree

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* Use Spark 1.6.0
* Use Apache Toree (new name/home of ibm-et/spark-kernel)
* Add missing pub key for binary
* Add SHA check for spark package download

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Set PYSPARK_PYTHON path in python2 kernelspec

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(c) Copyright IBM Corp. 2016

* Install python2 spec to CONDA_DIR instead of system prefix too

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(c) Copyright IBM Corp. 2016

Move to "internal" folder

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Added ubuntu:14.04 locale fix

Bump kernel gateway to 0.3.1

Also change CMD vs ENTRYPOINT to match what minimal-notebook
and some major official Docker images do (redis, mysql, nginx, ...)
by having the jupyter kernelgateway in the CMD, and just tini --
in the entrypoint

(c) Copyright IBM Corp. 2016

Notebook 4.1.x

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(c) Copyright IBM Corp. 2016

(c) Copyright IBM Corp. 2016

Also fix copyright headers on various files

Remove build deps from minimal-kernel image

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* Use setuptools to get modern pip (debian packaged pip stops
  working after requests gets updated)
* Don't use wget to fetch tini, use Python!

(c) Copyright IBM Corp. 2016

* Remove SHELL env var and leftover USER nobody
* Install wget for tini then immediately uninstall it
* Install build-essentials and python3-dev for tornado speed up
  then immediately uninstall them

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First time we've added a stack under the new versioning scheme

(c) Copyright IBM Corp. 2016

(c) Copyright IBM Corp. 2016

New docker stack for a headless kernel

Contribution (c) Copyright IBM Corp. 2016

Contribution (c) Copyright IBM Corp. 2016