bump version identifiers to 3.8.0
change runtime environment to java 6 where needed, don't include .classpath or .project files in build.properties
remove unexisting artefacts from build.properties
remove 'Eclipse-BundleShape: jar' to get rid of warnings
remove warnings from build.properties
delete empty plugin.xml
remove warning because of missing plugin.xml
remove dead code warning
remove maven related warnings