Bump version string to 0.3.0-SNAPSHOT
(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