[ANN] metric_fu 4.1.3 Released

A bugfix release of MetricFu

   - Features
      - Tests now pass in JRuby and Rubinius! (Benjamin Fleischer)
   - Fixes
      - Line numbers now display and link properly in annotated code
      (Benjamin Fleischer)
      - No longer remove historical metrics when testing metric_fu
      - Churn metric handler won't crash when no source control found (Dan
      Mayer)
   - Misc (Benjamin Fleischer)
      - Removed StandardTemplate, had no additional value and needed to be
      maintained
      - Removed most template references to specific metrics