switched shebangs to using virtualenv and added homebrew instructions

README.md

@@ -123,6 +123,11 @@ On Mac using MacPorts:
 
 ```sh
 sudo port install py35-serial
+
+# or if you prefer homebrew
+
+brew install python3
+pip3 install pyserial
 ```
 
 On Windows:

bin/ard-reset-arduino

@@ -1,4 +1,4 @@
-#!/usr/bin/python3
+#!/usr/bin/env python3
 
 import serial
 import serial.tools.list_ports

bin/ardmk-init

@@ -1,4 +1,4 @@
-#!/usr/bin/python3
+#!/usr/bin/env python3
 """
 Arduino-mk Makefile and project initialiser
 

bin/robotis-loader

@@ -1,4 +1,4 @@
-#!/usr/bin/python3
+#!/usr/bin/env python3
 
 # This script sends a program on a robotis board (OpenCM9.04 or CM900)
 # using the robotis bootloader (used in OpenCM IDE)