Fixed broken test where a PySequence was passed to DataSet#array()
Tidied up manifest (removed version numbers from own plugins)
Moved code from abstract dataset to old dataset to preserve behaviour
Modified string output to use new method to preserve old behaviour
Added casted reshape method and moved some unit tests over to check old extensible behaviour
Added another test for expanded datasets not containing NaNs
Added old benchmarking test
Updated reference to jython interpreter
Merge branch 'dataset'