Juan Cruz Viotti a803d4f646 Remove plugins manipulation commands
Since we're now forcing users to rely on `npm` directly for updates, we
can also get rid of plugin commands that attempt to
install/update/remove using npm programatically and require users to use
`npm` directly as well.

This commit removes the following commands:

- `plugins`
- `plugin install`
- `plugin update`
- `plugin remove`

Despite plugin related commands being removed, *the functionality that
scans for plugins and registers them remains intact*.
2015-08-19 10:57:42 -04:00
..
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2015-08-19 10:57:42 -04:00
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