Resolve #245: merge branch 'sschuepbach-master'
Resolve #245: merge branch 'sschuepbach-master'

Pull request with commits:
 - Version of jackson-core (Maven dependency) increased to 2.6.3

culturegraph/metafacture-core,hbz/metafacture-core,cboehme/metafacture-core,hbz/metafacture-core,cboehme/metafacture-core,cboehme/metafacture-core,hbz/metafacture-core,metafacture/metafacture-core,culturegraph/metafacture-core,metafacture/metafacture-core,metafacture/metafacture-core,culturegraph/metafacture-core,cboehme/metafacture-core