support filtering of commands (-- cmd and args to pipe to)
support filtering of commands (-- cmd and args to pipe to)

HeinrichHartmann/nad,circonus-labs/nad,esproul/nad,keithf4/nad,HeinrichHartmann/nad,keithf4/nad,sean-/nad,maier/nad,sean-/nad,esproul/nad,hjhart/nad,sean-/nad,keithf4/nad,maier/nad,maier/nad,HeinrichHartmann/nad,HeinrichHartmann/nad,hjhart/nad,circonus-labs/nad,hjhart/nad,circonus-labs/nad,hjhart/nad,sean-/nad,sean-/nad,circonus-labs/nad,circonus-labs/nad,maier/nad,hjhart/nad,HeinrichHartmann/nad,circonus-labs/nad,esproul/nad,esproul/nad,HeinrichHartmann/nad,esproul/nad,maier/nad,maier/nad,keithf4/nad,keithf4/nad