Minor docs
Made sprintf into safer snprintf to avoid overflows
Improved builtin help-functionality. Now, you can either type "HELP" or "" (see everything), "WIE" or "HELP WIE" to see help about anything starting with WIE, or "HELP WIPE" to see info about wipe (without invoking it)
Minor docs
And the actual firmware also
Merge pull request #16 from holiman/master

Improved built-in help