Permissions, Cookie class and ePermission enum.

models/users/User.cls.php: $ip moved to the request object. permissions methods were added and isGuest(), isMember().
models/users/Member.cls.php: exists() and verifyCookies() methods were added.
sources/cookies/Cookie.cls.php: Cookie class was added.
sources/enums/ePermission.cls.php: Permission enum was added.
sources/traits/tActiveTable.cls.php: added $column parameter to fetch() method.
sources/Request.cls.php: $ip property moved to Request class from User class.