Create main user without "fuse" group, instead add it later as part

of the "encfs" tag. This allows the user to make encfs optional.
Helps with issue #120.

roles/common/tasks/encfs.yml

 - name: Add mail user to fuse group
   user: name=mail append=yes groups=fuse
 
+- name: Add main user to fuse group
+  user: name={{ main_user_name }} append=yes groups=fuse
+
 # Check if the /encrypted directory is empty
 - name: Check for existing encfs
   shell: ls /encrypted/*

roles/common/tasks/users.yml

 - name: Create main user account
-  user: name={{ main_user_name }} state=present shell={{ main_user_shell }} groups=sudo,fuse
+  user: name={{ main_user_name }} state=present shell={{ main_user_shell }} groups=sudo