Fix tag to remove ['0', '1'] from the form

lib/orbit_tag/taggable.rb

@@ -46,7 +46,7 @@ module OrbitTag
 
       def tags=(tag_ids)
         tag_ids = [tag_ids].flatten
-        tag_ids.delete('')
+        tag_ids.delete_if{|e| e.match(/^[0-1]$|^$/)}
         ids = self.taggings.blank? ? [] : self.taggings.map{|t| t.tag.id}
         tag_ids.each do |tag_id|
           unless ids.include? tag_id