Python 3.2 Version check, Linux EXE'd, much more

* Added Python 3.2 version check, to prohibit running on unsupported versions, 
* Added Python 3 hashbang line for Linux. 
(Tested on Ubuntu 12.04.1 x86 running Python 2.7.3 and 3.2.3, Python 2.7.3 and 3.3.0 for Windows)
* Added global variables 
* Formatted intro message using the [string format method](http://docs.python.org/3.3/library/functions.html#format) * Added release links in README.md