Get rid of record traversal in unit tests.
Get rif of Submittable interface.
Get rid of PerfDataHandler interface.
Get rid of TraceEventHandler interface.
Factor out common classes into dedicated module.
Factor out common classes into dedicated module.
Some javadocs.
Merge pull request #102 from jitlogic/dev2

Lots of cleanups. Split out zorka-common module with some common classes.