Add implements 'siftool add' sub-command.

Del implements 'siftool del' sub-command.

Dump implements 'siftool dump' sub-command.

Header implements 'siftool header' sub-command.

Info implements 'siftool info' sub-command.

List implements 'siftool list' sub-command.

New implements 'siftool new' sub-command.

Setprim implements 'siftool setprim' sub-command.

Siftool is a program for Singularity Image Format (SIF) file manipulation.