Make scripts more compatible across OSes

utils/img2js.py

-#!/usr/bin/python
+#!/usr/bin/env python
 
 #
 # Convert image to Javascript compatible base64 Data URI

utils/launch.sh

-#!/bin/bash
+#!/usr/bin/env bash
 
 usage() {
     if [ "$*" ]; then

utils/web.py

-#!/usr/bin/python
+#!/usr/bin/env python
 '''
 A super simple HTTP/HTTPS webserver for python. Automatically detect
 

utils/websocket.py

-#!/usr/bin/python
+#!/usr/bin/env python
 
 '''
 Python WebSocket library with support for "wss://" encryption.

utils/websockify

-#!/usr/bin/python
+#!/usr/bin/env python
 
 '''
 A WebSocket to TCP socket proxy with support for "wss://" encryption.