Improved AggregationStrategies tests.
Added Comparator support to RLE.  Closes #21.
Merge pull request #26 from JosephCottam/Master

Added Comparator support to RLE.  Closes #21.
More general progress reporting in renderer.
Moving (and expanding) aggregation strategies tests.
Merge branch 'master' of github.com:JosephCottam/AbstractRendering
Null pointer exception avoided if no parent dir specified.
No longer includes docs on every build.
Various modifications to sample applications.
Transfer specialization moved to Transfer.specialized.  Passes ad-hoc tests.
Merge branch 'master' of github.com:JosephCottam/AbstractRendering
Transfer specialization is now a factory-like method.  Closes #27.