GitLab

ipfs1 docs read:

```
btc λ. ipfs pin
ipfs pin -

Commands:

        add         pin an ipfs object to local storage.
        rm          unpin an ipfs object from local storage.

        Use "pin help <command>" for more information about a command.
```

License: MIT
Signed-off-by: Brian Tiger Chow <brian@perfmode.com>

addresses
https://github.com/jbenet/go-ipfs/pull/263#issuecomment-62242970

@mappum

ToStrings and ToReaders

these weren't actually modified when commands2 was introduced. they're
exact replicas of the ones that presently exist in core/commands.

+ added recursive pinning func