OpenMC will now read the <directory> tag of a cross_sections.xml to determine abspath if present.
stripping whitespace from directory data in case of excess newlines.
Merge conflict between two additional test data.
Missed the added test in merge conflict, removed unused imports
if --> elif
Merge branch 'openmc-data-path' of https://github.com/jdangerx/pyne into jdangerx-openmc-data-path
Merge branch 'jdangerx-openmc-data-path' into develop