Merge pull request #106 from cprice404/feature/master/switch-to-logback

(PE-2106) Switch from log4j to logback
(PE-2105) Remove all jetty-related code (separating to jetty7 project)
(PE-2105) Clean up source paths and project.clj
(PE-2105) Remove jetty notes from testutils docs
(PE-2105) Update README to reflect removed jetty service
(PE-2105) Add Jetty9 webserver service mentions to docs