Mount MFS

Should IPFS Desktop allow the user to mount MFS to the file system or should this feature be incorporated into js-ipfs and go-ipfs?

@alanshaw has taken a step ahead and created [a module](https://github.com/tableflip/ipfs-fuse) to let us mount MFS.

I noticed there was another issue referencing something like this from 2015 (#154). I'll close that one and copy its content here to keep our discussion.

> @almereyda (jon r) on Dec 23, 2015
>
> As ipfs/go-ipfs:docs/fuse.md@master mentions, we can use the daemons --mount option to hook IPFS into the filesystem. As a station user, I want to be able to use the FUSE options as exposed via the config at http://127.0.0.1:5001/ipfs/QmR9MzChjp1MdFWik7NjEjqKQMzVmBkdK3dz14A6B5Cupm/#/config
>
> Which scenario like this is supported by it? Maybe a checkbox below the "Start Node" button, which is only shown with manually stopping the deamon, may do?

/cc @ipfs-shipyard/ipfs-gui-team