Merge pull request #30 from bziegler/admin_area_shortname

update readme.md for administrative_area.short_name (and contributor.md)

Author: slawek87

CONTRIBUTORS.md

@@ -4,3 +4,4 @@ Contributors List
 * Alexandre Souza ([@alexandre](http://github.com/alexandre))
 * Nikolai Nowaczyk ([@niknow](https://github.com/niknow))
 * Brendan Ebers ([@brendanebers](https://github.com/brendanebers))
+* Benedikt Ziegler ([@bziegler](https://github.com/bziegler))

README.md

@@ -86,7 +86,9 @@ print(my_location.street_number)
 print(my_location.postal_code)
 
 for administrative_area in my_location.administrative_area:
-    print("{}: {}".format(administrative_area.area_type, administrative_area.name))
+    print("{}: {} ({})".format(administrative_area.area_type, 
+                               administrative_area.name, 
+                               administrative_area.short_name))
 
 print(my_location.country)
 print(my_location.country_shortcut)