Merge pull request #12 from ekristen/master

fixing bug with common.sls that causes it to fail

nginx/common.sls

   file:
     - absent
 
-{% for dir in ['sites-available', 'sites-enabled'] -%}
-/etc/nginx/{{ dir }}:
-  file.directory:
-    - user: www-data
-    - group: www-data
-    - mode: 0755
-{% endfor -%}
-
 /etc/nginx:
   file.directory:
     - user: root