Merge pull request #256 from mradko/RELEASE-3.0-RC1

Release 3.0 rc1
Merge pull request #257 from mradko/RELEASE-3.0-RC1

Missing sources
Merge pull request #258 from mradko/RELEASE-3.0-RC1

Pom.xml fix
Missing .js files necessary for Process Instance Manager and Substitutions Manager.