Some minor feature additions and a rewrite of the documentation.

I wanted to integrate this with the IDE I use, so that I could quickly hit a button and have a new controller pop up in my application folder in the appropriate spot. So, I added support for calling generators "statically", by specifying the arguments on the command line. I also rewrote the readme in markdown to be read a bit easier. Finally, added support for specifying a different template to use on the command line. If the argument isn't specified, it defaults to the controller and model that came with the script.