Install 'fuse' instead of 'fuse-utils'

The 'fuse-utils' package doesn't exist on Ubuntu 14.04 and is marked as a
transitional package on both Debian 7 and Ubuntu 12.04 that installs the
'fuse' package.

Since Debian 7 is the officially supported distribution we can safely
switch to install 'fuse' instead of 'fuse-utils' and we also gain
compatibility with Ubuntu 14.04.

roles/common/tasks/encfs.yml

   with_items:
     - encfs
     - libfuse-dev
-    - fuse-utils
+    - fuse
 
 - name: Create encrypted directory
   file: state=directory path=/encrypted