dub commands do not run correctly.

[Alain De Vos]

dub lint returns,
>dub lint
Unknown command: lint

USAGE: dub [--version] [<command>] [<options...>] [-- 
[<application arguments...>]]

Manages the DUB project in the current directory. If the command 
is omitted,
DUB will default to "run". When running an application, "--" can 
be used to
separate DUB options from options passed to the application.

Run "dub <command> --help" to get help for a specific command.

You can use the "http_proxy" environment variable to configure a 
proxy server
to be used for fetching packages.


Available commands
==================

   Package creation
   ----------------
   init [<directory> [<dependency>...]]
                         Initializes an empty package skeleton

   Build, test and run
   -------------------
   run [<package>]       Builds and runs a package (default 
command)
   build [<package>]     Builds a package (uses the main package in