Added a condition for listing all categories if command equals $list when prompted with the password name.
Implemented the passwordDAO.listNames method
Coverage on passwordDAO.listNames method.
Refactored the $list string in a constant.
Changed quit command for $quit.
Refactor $quit command string in a constant.
Changed the message when prompted to enter the name.
Changed the message when prompted to enter the category.
Merge branch 'master' of https://github.com/petit-prince/pass-wrapper