Add readme file.

README.md

@@ -0,0 +1,11 @@
+# ISP 2 CSV
+
+Get results from https://db.ffdn.org/ API and output a CSV result file.
+
+## Run
+
+```bash
+python isp2json.py
+```
+
+It will produce a `isp.csv` file in the current directory