Adding unittests, restructored code

Author: jmeline

setup/Mac/Welcome.rtf

@@ -0,0 +1,8 @@
+{\rtf1\ansi\ansicpg1252\cocoartf1138\cocoasubrtf510
+{\fonttbl\f0\fswiss\fcharset0 Helvetica;}
+{\colortbl;\red255\green255\blue255;}
+\margl1440\margr1440\vieww10800\viewh8400\viewkind0
+\pard\tx720\tx1440\tx2160\tx2880\tx3600\tx4320\tx5040\tx5760\tx6480\tx7200\tx7920\tx8640\pardirnatural
+
+\f0\fs24 \cf0 Please click Continue to install ODMTools for your mac. \
+}