Use the new fuse.Unmount function.
Use the new fuse.Unmount function.

mbrukman/gcsfuse,GoogleCloudPlatform/gcsfuse,kahing/gcsfuse,jacobsa/timeutil,BanzaiMan/gcsfuse,GoogleCloudPlatform/gcsfuse,BanzaiMan/gcsfuse,GoogleCloudPlatform/gcsfuse,jacobsa/ratelimit