Added threshold and heartbeat interval as parameters that are passed into summa through json

Client can be sent a heartbeat and then send  a message back to the server

New data structures implmented full, program is working as well as it did before the new data structures

Shutdown messages still need to be implemented.

client now needs to send the server the message that it is done

Server now sends the client the proper settings.

Client only needs the hostname and the port number given to it by the user.

 - This allows parent actors to have info for recovery and for the information to not have to be read from a file in the case we are in a distributed situation

 - also added better error message for read_attribute.f90

Implemented a function that prints the functions to stdout for verification

Moved the definition of the settings functions to their own file

adjusted the makefile to include the new settings_functions

added documentation for distirbuted summa

added new python script for creating the settings