RAT-165: https://issues.apache.org/jira/browse/RAT-165
Added new system property rat.skip:boolean to be able to skip plugin execution.

Added last days commits to RELEASE_NOTES for 0.11-SNAPSHOT and in webpage templates (no rebuild triggered):
 - changed webpage's year to 2014
 - integrated mvn default goal in Quick start
 - fixed dozens of JavaDoc problems with Java8's javadoc that made maven-site-plugin:3.3 fail.
 - Updated to maven-plugin-tools-javadoc, maven-plugin-plugin 3.3 (from 3.2) in the process of getting a solution for https://jira.codehaus.org/browse/MPLUGIN-237 

Minor refactorings
 - to reduce amount of deprecation warnings: use org.junit.Assert instead of junit.framework.Assert
 - add String constants 
 - removed [WARNING] Deprecated @component for project field in org.apache.rat.mp.RatReportMojo/RatCheckMojo.: replace with @parameter name="${project}" @readonly in abstract super class
 - removed unnecessary public keywords in some interfaces



git-svn-id: https://svn.apache.org/repos/asf/creadur/rat/trunk@1613829 13f79535-47bb-0310-9956-ffa450edef68