Change shebang lines to work universally

Using env enables the scripts to run in virtualenv as well as in a
differently named or bare environment.

Signed-off-by: Felix Kaechele <felix@kaechele.ca>

run.py

@@ -1,4 +1,4 @@
-#!flask/bin/python
+#!/usr/bin/env python
 from app import app
 from config import PORT