add axlim_union

Signed-off-by: Mark Histed <mhisted@gmail.com>
xlswritepoi: check to see if locked (if Excel has it open)

Signed-off-by: Mark Histed <mhisted@gmail.com>
hash_recurse: doc update

Signed-off-by: Mark Histed <mhisted@gmail.com>
frm_extractrow: error checking

Signed-off-by: Mark Histed <mhisted@gmail.com>
add cleanfields: rename struct fields to conform with matlab rules (can be non-conforming if passed in by another program i.e. python)

Signed-off-by: Mark Histed <mhisted@gmail.com>
frm_extractrow: add errorcheck

Signed-off-by: Mark Histed <mhisted@gmail.com>
add a testing dir with a few POI tests

Signed-off-by: Mark Histed <mhisted@gmail.com>