websites: add tags to each included role

Specifying a unique tag for each website role included in the
`websites.yml` playbook will allow convenient partial runs of the
playbook to deploy a subset of the websites it manages.

websites.yml

@@ -3,11 +3,16 @@
     apache_default_ssl_vhost: false
   roles:
   - apache
-  - websites/pyrocufflink.net
+  - role: websites/pyrocufflink.net
-  - websites/dustin.hatch.name
+    tags: websites/pyrocufflink.net
-  - websites/ebonfire.com
+  - role: websites/dustin.hatch.name
-  - websites/nratonpass.com
+    tags: websites/dustin.hatch.name
-  - websites/darkchestofwonders.us
+  - role: websites/ebonfire.com
+    tags: websites/ebonfire.com
+  - role: websites/nratonpass.com
+    tags: websites/nratonpass.com
+  - role: websites/darkchestofwonders.us
+    tags: websites/darkchestofwonders.us
   - role: cert
     cert_src: websites/chmod777.sh.cer
     cert_dest: /etc/pki/tls/certs/chmod777.sh.cer