Fixed typo, false->False.
No longer defaulting to reading from standard in.

Instead printing usage message when not given a path.
Using sys.exit instead of os.exit.
Handling error from parser.

For now just printing error message and sys.exit.
Changed window size.

1600x1200 -> 1200x900.
Printing hard coded application name in usage message.

Instead of sys.argv[0]. In the normal case the user didn't specify the
full path to Hvergelmir.py by hand. Instead a runner script is used.
Don't know how to find the command that the user entered.
Launcher script.

Adds the source directory to PYTHONPATH and then runs pyton, passing
Hvergelmir.py and any extra user arguments.