added bucket configuration option

lib/airbrake-statsd/configuration.rb

@@ -14,6 +14,11 @@ module Airbrake
       end
       attr_writer :port
 
+      def bucket
+        @bucket ||= 'exceptions'
+      end
+      attr_writer :bucket
+
     end # Configuration
   end # Statsd
 end # Airbrake

spec/unit/airbrake-statsd/configuration_spec.rb

@@ -37,6 +37,17 @@ module Airbrake
         end
       end
 
+      describe '`bucket` option' do
+        it 'defaults to "exceptions"' do
+          subject.bucket.should == 'exceptions'
+        end
+
+        it 'can be set' do
+          subject.bucket = 'errors'
+          subject.bucket.should == 'errors'
+        end
+      end
+
     end
   end
 end