v1.3.1-kubernetes-1.8.x

1. Add detach logic after umount volume

v1.3-kubernetes-1.8.x

1. Compatible with Kubernetes 1.8.x
2. Allow fsType setting by specifying 'kubernetes.io/fsType' in annotations for PVC
3. Add Wait logic when attaching volume
4. More log output for better debug experience

v1.2-kubernetes-1.7.x

1. Compatible with Kubernetes 1.7.x
2. Allow fsType setting by specifying 'kubernetes.io/fsType' in annotations for PVC
3. Add Wait logic when attaching volume
4. More log output for better debug experience