nanshe_learner: Changed mechanism of determining path to the nanshe_learner executable to queue up subprocess calls in generate_neurons_blocks.
HDF5_serializers: Corrected case of unicode filename. Also, corrected a bug with region refs that were gotten to through an External Link.
nanshe_learner: Turned off using external links to the input file for the blocks case. Presently, copies the input file data into the output file, which appears to work.
nanshe_learner: Added debug output for merging the results from blocks in generate_neurons_blocks.
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.