ENH: Cover non-planar slice normals in GDCM series direction tests
BUG: Make ITKData a build prerequisite of the GDCM GoogleTest driver
ENH: Label discovered GoogleTest tests with their module
ENH: Check printed non-string metadata in the TIFF info test
ENH: Print full metadata value in MRC IO test
ENH: Make numeric I/O locale-independent without locale objects
BUG: Check gzip availability before the special-float gzip test
STYLE: Write the comment round-trip file in the per-test tmp directory