switches from Maven release plugin to JGitFlow plugin
updates Tycho to version 0.19
adds a dummy java source file to create javadoc from -> required for Sonatype OSS
changes deployment repository for Eclipse artifacts to Sculptors website repository
replaces real version number with ‘magic’ Tycho version number
replaces hard-coded sculptor version with project version
inserts projects version number into generated POMs Sculptor version property via Maven resource plugins filtering mechanism (found in http://stackoverflow.com/questions/7223031/how-to-embed-archetype-project-version-in-maven-archetype/)
adds workaround to prevent Maven from executing the 'generate-sources' phase twice due to Maven source plugins issue http://jira.codehaus.org/browse/MSOURCES-13
updates version of Maven plugins
allows to merge Eclipse update site with existing documentation
allows jgitflow:release-finish despite of modified MANIFEST.MF in sculptor-metamodel
backups and restores the MANIFEST.MF file
updates POMs and MANIFST.MFs for release of version 3.0.0
updating poms for 3.0.0 release
Merge branch 'release/3.0.0'