add docker configuration (rushter#13)

* add docker configuration

Why:

* it's a nice way to work in a disposable environment

This change addresses the need by:

* add dockerfile
* update readme to explain usage

Reference Links:

*

* switch to using official python image as a base

Why:

* removes a lot of custom setup

This change addresses the need by:

* swap out buildpack-deps:trusty with python:3
* remove setup lines that are no longer required
* clean up comment to describe the RUN command

Reference Links:

* https://hub.docker.com/r/library/python/

Author: JamesChevalier

Dockerfile

@@ -0,0 +1,10 @@
+FROM python:3
+
+RUN mkdir -p /var/app
+WORKDIR /var/app
+COPY . /var/app
+
+# install scipy & numpy
+# install required packages
+RUN pip install scipy numpy && \
+    pip install .

README.md

@@ -37,5 +37,11 @@ All algorithms are implemented in Python, using numpy, scipy and autograd.
         cd MLAlgorithms
         python -m examples.linear_models
 
+### How to run examples within Docker
+        cd MLAlgorithms
+        docker build -t mlalgorithms .
+        docker run --rm -it mlalgorithms bash
+        python -m examples.linear_models
+
 ### Contributing
 Your contributions are always welcome!