#32 Command parsing should be stricter

[Lee Harr]

Originally reported on Google Code with ID 61
``` What steps will reproduce the problem? 1. type, for instance 'helpme'

What is the expected output? What do you see instead? Expected output: "I have no idea." (the message we show when the user types something we don't recognize) What I see instead: the result of 'help me'

What version of the product are you using? On what operating system? SVN r450, GNU/Linux

Please provide any additional information below. This issue is a blocker for issue #54 .

```

Reported by mindboosternoori on 2011-11-09 15:02:56