[maven-release-plugin] prepare release pgjdbc-ng-0.4
[maven-release-plugin] prepare release pgjdbc-ng-0.4

jesperpedersen/pgjdbc-ng,brettwooldridge/pgjdbc-ng,frode-carlsen/pgjdbc-ng,gregb/pgjdbc-ng,jesperpedersen/pgjdbc-ng,gregb/pgjdbc-ng