General changes

    1. Old mode, in which all the events are sent to every Monitoring Task
    2. New mode, called dispersion, in which events are equally distributed among  all the available Monitoring Tasks, i.e. each MT receives 1/Nth of the total amount of events where N is a total number of MTs.
An MT application may switch from one mode to another using the last parameter for the emon::select function. This boolean parameter by default is set to false, which means that the old mode will be used. If one sets this parameter to true, the new dispersion mode will be used. One should note that the value of the dispersion parameter will be applied only to the current MT and to all its children.

To be implemented