indicator.ino (state_test): New state

* indicator.ino (state_test): New state.
  (loop): Add it.
  (shiftOut, state_heartbeat): Use short values.
Update indicator.ino

add led demo functionality
Update indicator.ino
Merge pull request #2 from gymlyg/2nd-chip-debugging

add led demo functionality
indicator.ino: Fix coding style