Merge pull request #166 from acz-icm/master

Support for empty titles
Updated usage of ceon-scala-commons, because of package name change.
Merge pull request #167 from miconi/master

Updated usage of ceon-scala-commons, because of package name change.
make WorkYearComparator immune to non integer years (e.g. 2012/2013)
Merge pull request #168 from krzywojc/master

make WorkYearComparator immune to non integer years (e.g. 2012/2013)
Change to oozie workflow 0.4 scheme; added task timeout