Adding metric_fu to Rakefile

Rakefile

@@ -1,6 +1,22 @@
 $LOAD_PATH.unshift(File.join(File.dirname(__FILE__), 'lib'))
 require 'rubygems'
 require 'rake'
+require "yaml"
+require "active_support"
+require 'active_support/json'
+begin
+  require 'metric_fu'
+  MetricFu::Configuration.run do |config|
+    config.metrics  = [:churn,:flay, :flog, :reek, :roodi]
+    config.graphs   = [:flog, :flay, :reek, :roodi]
+    config.flay     = { :dirs_to_flay => ['spec', 'lib']  }
+    config.flog     = { :dirs_to_flog => ['spec', 'lib']  }
+    config.reek     = { :dirs_to_reek => ['spec', 'lib']  }
+    config.roodi    = { :dirs_to_roodi => ['spec', 'lib'] }
+    config.churn    = { :start_date => "1 year ago", :minimum_churn_count => 10}
+  end
+rescue LoadError
+end
 
 begin
   require 'jeweler'