apply_along_axis is trimming strings to be the same length

[matsen]

Well this is freaky:

EGEFCCCHNQNFWVAMNPIANYCCCCMHMH  TCRBV07-07  TCRBJ02-07                                                                                                                                                                                                                                                                        
AGAVPVKASHFPYFGIALRKCWMTREH     TCRBV23-or  TCRBJ01-05                                                                                                                                                                                                                                                                        
WDFRHNRYGIEVFWWRWHSHGFPHDFGAMD  TCRBV23-or  TCRBJ01-06
CASSLGGNYGYFF                   TCRBV27-01  TCRBJ01-01                                                                                                                                                                                                                                                                        
CASSLLGNNEATF                   TCRBV30-01  TCRBJ01-01                                                                                                                                                                                                                                                                        
CASSLEGSGGYEQTF                 TCRBV02-01  TCRBJ02-01                                                                                                                                                                                                                                                                        
SGEWPERMWPVPTTQLWGWNSNNHLWLNIY  TCRBVA-or0  TCRBJ02-07

The orphon genes are getting truncated.

[matsen]

This is because I'm using apply_along_axis from numpy: numpy/numpy#8352

This is a known problem.