Install a plugin

Usage: plugman install PARAMETER... [OPTION]...

Parameters:
  --platform <platform>     The platform for which to install the plugin
  --project <directory>     Path to a cordova-generated project of <platform>
  --plugin <plugin>         The spec of the plugin to install. Anything that
                            could be passed to npm install

Options:
 --variable NAME=VALUE      Some plugins require install-time variables to be
                            defined. These could be things like API keys/tokens
                            or other app-specific variables.
 --www <directory>          www assets for the plugin will be installed into
                            this directory. Default is to install into the
                            standard www directory for the platform specified
 --plugins_dir <directory>  a copy of the plugin will be stored in this
                            directory. Default is to install into the
                            <project directory>/plugins folder
 --searchpath <directory>   when looking up plugins by ID, look in this
                            directory and each of its subdirectories for the
                            plugin before hitting the registry. Multiple search
                            paths can be used by either specifying the flag
                            multiple times, or by separating paths with a
                            delimiter (: on 'nix, ; on Windows).