Make labours.py runnable

README.md

@@ -208,7 +208,7 @@ python3 labours.py [--text-size] [--relative]
 
 `--text-size` changes the font size, `--relative` activate the stretched burndown layout.
 
-### custom plotting backend
+### Custom plotting backend
 
 It is possible to output all the information needed to draw the plots in JSON format.
 Simply append `.json` to the output (`-o`) and you are done. The data format is not fully

labours.py

@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 import argparse
 from datetime import datetime, timedelta
 import io