commandline 0.1.2dev

This is a helper module for making intuitive command line programs with
zero effort. It takes a function signature like:
example_function(string1, string2='something', string3='something else')
and turns it into a simple command-line app with usage:
example_program string1 [string2 [string3]]

All you have to do is:
if __name__ == "__main__":
import commandline
commandline.run_as_main(example_function)

Limitations
============

Note that it currently can't print help information for arguments other than their default values,
but it will print your docstring for you if that's of any use.
Help for arguments will probably come with python3000's function annotations.
http://www.python.org/dev/peps/pep-3107/

Argument types are inferred from the default arguments. Currently supported are:
int, float, bool, str, commandline.Choice
If things don't have a default argument, I can't infer the type, so assume str.