GPII-442:  Detect running solutions -- Nodejs events.

First pass at integrate node's event systme to fire an event
when the process switches between running and not running, and
vice versa.
GPII-442:  Detect running solutions.

Renamed gpii.processes.refreshPrcoInfo() to
gpii.processes.updateProcInfo(), and made use of it.
GPII-442:  Detect running solutions -- simplify interface.

Simplify the interface for setting up monitoring a process and
responding to events.