[maven-release-plugin] prepare release 0.3.0
[maven-release-plugin] prepare release 0.3.0

codenvy/codenvy,codenvy/codenvy,R-Brain/codenvy,codenvy/codenvy,R-Brain/codenvy,codenvy/codenvy,codenvy/codenvy,R-Brain/codenvy,R-Brain/codenvy,R-Brain/codenvy,R-Brain/codenvy,codenvy/codenvy