Add simple Optuna illustrations

Author: gjbex

source-code/parameter-optimization/README.md

@@ -17,3 +17,5 @@ values a in parameter space are explored.
     parameters by running jobs and using the result.
   1. `JuliaProcesses`: illustration of optimizing application
     parameters by running processes.
+  1. `optuna`: illustrations of using Optuna for hyperparameter
+    optimization.

source-code/parameter-optimization/optuna/README.md

@@ -0,0 +1,9 @@
+# Optuna
+
+Optuna is a Python framework for automated hyperparameter optimization.
+
+
+## what is it?
+
+1. `simple.py`: very simple example of how to use Optuna to optimize a function.
+1. `experiments.ipynb`: some experiments on more complicated function optimization.