Save current layout

[mewtlu]

I'd really like this feature to be implemented into itermocil (and will be looking into/working on it myself too), and I believe it should possible. Although it wouldn't be the best UX right now, it's possible in iTerm to set the preference output directory (Preferences > General > Preferences > Load preferences from a custom folder or URL), which then saves an XML file named com.googlecode.iterm2.plist, which includes all current window layouts under Window Arrangements, which we'd just then have to parse to convert it to yaml.