HDF5_importer: Renamed to nanshe_converter.
nanshe_converter: Renamed from HDF5_importer.
nanshe_learner: Refactored name change of HDF5_importer to nanshe_converter.
neuron_volumina_viewer: Created a mechanism that provides an operator for max projection onto a source. Added MaxProjectionConstantSource and MaxProjectionConstantRequest for dealing with determing the max projection of a constant source (will not change or become dirty) along one dimension.