Add README

Author: gjbex

source_code/intersection_trees/README.md

@@ -0,0 +1,16 @@
+# Intersection trees
+
+This project illustrates that implementation details, but mostly algorithmic
+choices, can have an impact on performance when performing intersection queries
+on intervals.
+
+
+## What is it?
+
+1. `intersection_trees.ipynb`: Jupyter notebook illustrating the different
+   implementations and their performance.
+1. `naive_pythonic_intersectionic_queries.py`: brute force implementaion that
+   uses sets and named tuples.
+1. `naive_intersectionic_queries.py`: brute force implementaion that
+   uses lists and tuples.
+1. `interval_tree.py`: implementation of an interval tree.