Don't require a port when using modtool, by default get_controller will connect to the first attached USB COMM device with a Vendor ID matching the FTDI chip (403). Potential future enhancements: Also match the Product ID, modify the VID/PID of the chip so that it is definitely a MoMo (this would require a custom driver).
D'oh.  Select USB devices that match the pattern, not ones that don't.
Merge pull request #44 from amcgee/patch-fsu-autodetect

Merging this.