Support unicode string in python client.

modules/swagger-codegen/src/main/resources/python/api.mustache

@@ -1,4 +1,6 @@
 #!/usr/bin/env python
+# coding: utf-8
+
 """
 {{classname}}.py
 Copyright 2015 Reverb Technologies, Inc.

modules/swagger-codegen/src/main/resources/python/model.mustache

@@ -1,4 +1,6 @@
 #!/usr/bin/env python
+# coding: utf-8
+
 """
 Copyright 2015 Reverb Technologies, Inc.
 
@@ -39,7 +41,7 @@ class {{classname}}(object):
             {{#vars}}
             '{{name}}': '{{baseName}}'{{#hasMore}},{{/hasMore}}
             {{/vars}}
-        }       
+        }
 
         {{#vars}}
         {{#description}}#{{description}}

modules/swagger-codegen/src/main/resources/python/swagger.mustache

@@ -1,4 +1,6 @@
 #!/usr/bin/env python
+# coding: utf-8
+
 """Swagger generic API client. This client handles the client-
 server communication, and is invariant across implementations. Specifics of
 the methods and models for each application are generated from the Swagger