Small improvements to django/bin/make-messages.py

[Ludvig Ericson]

Patch adds a -h to get the help (struck me as odd that it didn't have one, so I added it), and moves the usage message to its own function (_print_usage), I also took the liberty of updating how the message is printed. See the patch for what (it's a small one.)

[Marc Fargas]

Uhm.. "-h" would be nice to have :)

[Malcolm Tredinnick]

The option parsing in there is getting pretty messy

Let's wait until I merge this into management.py, since that will give us the options automatically (including an automatic help message). So I'm going this as wontfix because it will be more or less automatically fixed by the reorganisation. (You're right, though, we should have a help option.)