Make executable on Linux

on_this_day.py

@@ -1,3 +1,4 @@
+#!/usr/bin/env python
 from datetime import datetime, timedelta
 from mastodon import Mastodon
 from bs4 import BeautifulSoup

status.py

@@ -1,3 +1,4 @@
+#!/usr/bin/env python
 import config
 from mastodon import Mastodon
 from urllib.parse import urlparse

threads.py

@@ -1,3 +1,4 @@
+#!/usr/bin/env python
 import config
 from mastodon import Mastodon
 from treelib import Node, Tree