Prevent conflicting CLI options on the "-f" argument

Renamed "flip" and "flop" to mirror so that they don't conflict with the short form of the "--from" argument
Fix short-form command-line arguments

Since we've had leading spaces the short keys were actually auto-generated instead of being picked up from our setup. This led to key conflicts which were practically untraceable.

Reported by John Geehreng and more detail on the issue at

http://stackoverflow.com/questions/19242638