Add protocol to backup path

Fixes #2

templates/config.yaml.j2

@@ -11,7 +11,7 @@ location:
 
   # Paths to local or remote repositories.
   repositories:
-  - "{{ borgbackup_target_user }}@{{ borgbackup_target_ip }}:{{ borgbackup_repo_path }}"
+  - "ssh://{{ borgbackup_target_user }}@{{ borgbackup_target_ip }}:{{ borgbackup_repo_path }}"
 
   exclude_patterns:
   {% for item in borgbackup_exclude_dirs %}