add error handling for Tencent status code 199

lib/geocoder/lookups/tencent.rb

@@ -31,6 +31,9 @@ module Geocoder::Lookup
       case doc['status']
       when 0
         return [doc[content_key]]
+      when 199
+        raise error(Geocoder::InvalidApiKey, "invalid api key") ||
+        Geocoder.log(:warn, "#{name} Geocoding API error: key is not enabled for web service usage.")
       when 311
         raise_error(Geocoder::RequestDenied, "request denied") ||
           Geocoder.log(:warn, "#{name} Geocoding API error: request denied.")

lib/geocoder/results/tencent.rb

@@ -13,10 +13,9 @@ module Geocoder::Result
       #@data['title'] or @data['address']
     end
 
-    # The Tencent reverse reverse geocoding API has the field named
+    # NOTE: The Tencent reverse geocoding API has the field named
     # 'address_component' compared to 'address_components' in the 
     # regular geocoding API.
-
     def province
       @data['address_components'] and (@data['address_components']['province']) or 
       (@data['address_component'] and @data['address_component']['province']) or