Update versions to latest stable for Cascading, Hadoop, Solr
Merge branch 'master' of github.com:ScaleUnlimited/cascading.solr
Lots of changes to sync with Hadoop 2.2/Cascading 2.5

Not done yet, as there's a Kryo issue in cascading.utils that needs to
be fixed upstream
Bump cascading.utils to 2.5.1