Implementing a Spinner class and utilizing it around a run action. This
will add a moving icon that animates in place until output is reached,
letting the operator know that things are happening.
The interactive TTY test is included to ensure that during some unknown
usage such as logging to disk this feature doesn't spew unnecessary
clutter.
Change-Id: Ieef256a5c12b238008e9250c0ee182d80a2b6dfb
e11b458946