API get_members: Return a dictionary of users, not a list of tuples.

I believe this should require no special work on deploy, since some
grepping of logs suggests we are not currently using this API query.

(imported from commit 240086f900c6680cbc90bf6a2f334a9e1f172df6)

api/examples/list-members

@@ -41,5 +41,5 @@ parser.add_option_group(humbug.generate_option_group(parser))
 
 client = humbug.init_from_options(options)
 
-for name, email in client.get_members()["members"]:
-    print name, email
+for user in client.get_members()["members"]:
+    print user["full_name"], user["email"]

zephyr/views.py

@@ -1319,7 +1319,8 @@ def json_get_members(request, user_profile):
     return get_members_backend(request, user_profile)
 
 def get_members_backend(request, user_profile):
-    members = [(profile.full_name, profile.email) for profile in \
+    members = [{"full_name": profile.full_name,
+                "email": profile.email} for profile in \
                    UserProfile.objects.select_related().filter(realm=user_profile.realm)]
     return json_success({'members': members})