updated pom to include checkstyle maven plugin
added custom checkstyle configuration with a small sample set of checks, including ones with customized properties.
changed xml editor formatter to stop putting whitespace before ending bracket.
added some more checkstyle checks up to DefaultComesLast.
using the google-api-java-client checkstyle config as a base reference.
removed unused checks.
applied style formatting to checkstyle config file.
added extra checks to the google checkstyle.