Give buffer module a  'long' C data type
Fix a bug in class module, class_meta.__index called resolve incorrectly
Export the issubclass function from class module
Clean up some lua-hdf5 things for icc builds
Continue improving robustness of Linux / icc build
Do some cosmetics
Bring modules up-to-date to run convergence problems
Improve the class module MRO: breadth-first search
Modify DataSet:path member function not to include leading slash
Improve safety of mpio options