Revamp subcommands to enable granular execution

[emmanuelbuah]

Currently, the only subcommand supported is rerun which runs up on the previous version of the version given. Thus 9,rerun runs up on version 8. This command is very limited and a bit confusing. Proposing revamping commands to

Rerun a specific version up or down => 9,up or 9,down which executes version 9's up or down function.
Rerun a from vX to vY => 8-10 which exectues all up functions on version 8, 9 7 10.