Significant development -- new functions, new tests
Significant development -- new functions, new tests

Refactored to add setUpTestDir and tearDownTestDir for more concise class setup/teardown
Added TestORCAEngradBadData & supporting code, at this point only for checking invalid atomic numbers
Completed TestORCAHessMissingBlocks & supporting code
Partially completed TestORCAHessTruncatedBlocks
bskinn/opan,bskinn/opan