Starts a program which takes some time to finish.
Wrapper in foris-controller is able to run it asynchronously.
It also reads its output to send notifications according to the matched
* program which takes some time
* it is continuosly sending some output data
* copy sample program into the system
* schema for sample_notification, sample_exit notification added
* schema for sample_trigger, sample_status requests/replies aded
* handle sample_trigger and sample_status actions added
* note that sample_trigger prepares notification handlers and reset
notification connection function
* link sample_trigger and sample_status with backend functions
* handles command using AsyncCommand class
* ajax call handling added
* ajax calls for sample_trigger and sample_status