Description option added

- Added description to API call. Defaults to empty string.
- Variable descriptoin and example added to readme

tasks/authorize_node.yml

@@ -17,6 +17,7 @@
         Authorization: bearer {{ zerotier_accesstoken }}
       body:
         name: "{{ zerotier_register_short_hostname | ternary(inventory_hostname_short, inventory_hostname) }}"
+        description: "{{ zerotier_member_description | default() }}"
         hidden: false
         config:
           authorized: "{{ zerotier_authorize_member }}"