Rename user_tags to get_tag_users

The former sounded as if it returned tags, not users. Our naming and
object-oriented-ness may not be the greatest throughout, but this is
consistent with e.g. `get_tag_jobs`.

/cc @StephaneJuban for a heads up :-)

lib/angellist_api/client/users.rb

@@ -70,9 +70,10 @@ def me
       def user_roles(id, options={})
         get("1/users/#{id}/roles", options)
       end
-
-      # Returns users that are tagged with the given tag, either a LocationTag or
-      # MarketTag. Results are paginated and ordered from highest quality to lowest quality.
+
+      # Returns users that are tagged with the given tag, either a LocationTag
+      # or MarketTag. Results are paginated and ordered from highest quality to
+      # lowest quality.
       #
       # @requires_authentication No
       # @paginated Yes
@@ -91,9 +92,9 @@ def user_roles(id, options={})
       #   investors who reside in the given tag. by_activity will only return investors
       #   who invest in the given tag.
       #
-      # @example Get users tagged with Louisville tag (1654) and all its children's tag.
+      # @example Get users tagged with tag ID, and all children of that tag.
       #   AngellistApi.user_tags(1654, :include_children => 1)
-      def user_tags(id, options={})
+      def get_tag_users(id, options={})
         get("1/tags/#{id}/users", options)
       end
     end

spec/integration/users_spec.rb

@@ -31,7 +31,7 @@
   end
 
   it 'gets the investors that are tagged with the given tag' do
-    investors = client.user_tags(tag_id, :investor => 'by_residence')
+    investors = client.get_tag_users(tag_id, :investor => 'by_residence')
     user = client.get_user(investors.users.first.id)
     user.locations.any? { |loc| loc.id == tag_id  }.should be true
   end

spec/unit/lib/angellist_api/client/users_spec.rb

@@ -35,5 +35,13 @@
       client.me.should == "success"
     end
   end
+
+  describe '#get_tag_users' do
+    it 'gets 1/tags/<id>/users' do
+      id = "123"
+      client.should_receive(:get).with("1/tags/#{id}/users", {}).and_return("success")
+      client.get_tag_users(id).should == "success"
+    end
+  end
 end