Initialize ruTorrent plugins on launch

[jnsn]

Fixes #71

Add the execute command to initialize the ruTorrent plugins on launch.

Directory structure of a clean launch without the command:

$ tree data/rutorrent/share/
data/rutorrent/share/
├── torrents
└── users

2 directories, 0 files

Directory structure of a clean launch with the command:

$ tree data/rutorrent/share/
data/rutorrent/share/
├── torrents
└── users
    └── rtorrent
        ├── settings
        │   ├── erasedata
        │   ├── extsearch.dat
        │   ├── loginmgr.dat
        │   ├── rss
        │   │   └── cache
        │   │       └── info
        │   ├── rtorrent.dat
        │   ├── scheduler.dat
        │   └── trafic
        │       ├── torrents
        │       └── trackers
        └── torrents

11 directories, 5 files

[crazy-max]

LGTM