Brought in checkstyle.xml template.

When running mvn site this file gets generated under target/checkstyle-checker.xml
I had not configured the reporting element in the pom to point to my local checkstyle.xml, but I like all the checks this template gives me outside of my own.
In preparation for merge with feature/javadoc branch I am trying to prevent conflict on specific file(src/main/resources/checkstyle.xml).

See http://git-scm.com/book/en/v2/Customizing-Git-Git-Attributes#Merge-Strategies and http://stackoverflow.com/a/15233458
#7 Tweaked check style to accept 120 character lines and hopefully Javadocs.
#7 Tweaked some more check style shiz
#7 com.colapietro.number.util  package is Checkstyle error free.
#7 brought back slimmer check style configuration.
#7 Checkstyle fix. My god the parameters.
Merge branch 'feature/checkstyle-duex' into develop