Fuse fails to mount a previously mounted filesystem

[wnielson]

If I run coffee fs.coffee, kill it, and then rerun it, I get the following error:

2015-1-19T10:34::9 - info: unmounting output: Unmount successful for /Volumes/Google
fuse: bad mount point `/Volumes/Google': No such file or directory
/Users/wnielson/Projects/node-gdrive-fuse/src/fs.coffee:813
          fuse.fuse.mount({
                    ^
Error parsing fuse options: No such file or directory

I believe this is because running diskutil umount force causes the directory to also be removed. The simple solution is just to run mkdir, but it seems like the program should at least try to make the directory before giving up.