Add ability to exclude events from Meetup Group

Author: marcoroth

_data/meetup_groups.yml

@@ -62,6 +62,7 @@
 
 - id: nyc-rb
   name: NYC.rb
+  exclude: Rails Camp
   service: meetupdotcom
 
 - id: paris_rb

meetup_client.rb

@@ -108,6 +108,10 @@ def upcoming_events
       events = events.select! { |event| event.title.include?(filter) }
     end
 
+    if exclude.present?
+      events = events.reject! { |event| event.title.include?(exclude) }
+    end
+
     events
   end