version bump 0.2.3

Merge pull request nategood#10 from felds/master

Avoid double help

v0.2.1 File support

Merge branch 'v0.2.0'

Conflicts:
	src/Commando/Command.php

fixes nategood#2 reopened

only perform validation on options/flags not arguments/values

fixes nategood#2 do not truncate option values :-)

Beep Beep. Apparently people like beeps.

Added basic terminal beep method to the Terminal utility class
Added a beepOnError option to Command that will do just that
Added an example of a script that will error and beep on error