updated README

Author: mxsmith-godaddy

README.md

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+# Sonar Ruby Plugin
+
+This plugin adds support for projects written in Ruby to be analyzed by Sonar.
+
+Currently only captures very basic metrics (LOC, Comment %, Overall Coverage %).
+Source code displays with simple code highlighting.  
+
+### Plans include:
+* Parsing RCov reports for detailed test coverage metrics
+* Parsing Flog reports for complexity score metrics