solve PHP Notice:  Undefined variable: command at CommandBase::getCommand()
Checking in changes prior to tagging of version 1.7.0.
Merge pull request #11 from phpbrew/master

solve PHP Notice:  Undefined variable
Checking in changes prior to tagging of version 1.7.1.
update changes
Refactor zsh code related functions to Zsh class
Refactoring zsh generator
migrate to new GetOptionKit class
merge example script
delete example/logger.php
gerneate program signature
Add getSuggestions and getValidValues method to ArgumentInfo
update example
Add MetaCommand to output command attributes
Rename arg type => arg isa
just isa = number & boolean
avoid php5.4 square quote
Checking in changes prior to tagging of version 1.7.2.
More command error exception classes
error message for InvalidCommandArgumentException