Merge pull request #1 from gjbex/development

Add README describing the source code and requirements

Author: gjbex

source-code/README.md

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+# Source code
+
+This is source code that is either used in the presentation, or was developed
+to create it.  There is some material not covered in the presentation as well.
+
+## Requirements
+
+* Python version: at least 3.6
+* Packages:
+  * numpy
+  * scipy
+  * matplotlib
+  * bokeh
+  * sympy
+  * pytables
+  * skimage
+  * Jupyter notebook
+  * ipywidgets
+* Optional packages
+  * opencv
+  * mumexpr
+  * pandas
+
+## What is it?
+* [`birdsong`](birdsong): illustration of signal processing with scipy, reading
+  and writing of a WAV file, computing the amplitude spectrum using FFT, applying
+  a high-pass filter.
+* [`boekh`](bokeh): illustrations of how to create plots using bokeh, including
+  interactive plots.
+* [`hdf5`](hdf5): illustrations of how to create and access HDF5 files.
+* [`image-processing`](image-processing): illustrations of image processing using
+  scikit-image and video processing using OpenCV.
+* [`matplotlib`](matplotlib): illustrations of how to create plots using matplotlib.
+* [`matrices`](matrices): some numpy illustrations.
+* [`numpy`](numpy): some numpy and scipy illustrations.
+* [`sympy`](sympy): some illustrations of doing symbolic computations using sympy.