added support to invseries subcommand to retrieve multiple isotopes
added support to invseries subcommand to retrieve multiple isotopes

mbmcgarry/cyan,gidden/cyan,gidden/cyan,rwcarlsen/cyan,rwcarlsen/cyan,mbmcgarry/cyan,rwcarlsen/cyan,mbmcgarry/cyan,gidden/cyan,rwcarlsen/cyan,mbmcgarry/cyan,gidden/cyan