Round up release

Support defining code based input sources and actions.

• Input Source functions are defined via extending the SourceFunction class
• Action functions
• Loop is initialised in the Scheduler constructors instead of delaying till run()
• Input and Action processes can be defined using an array of parameters rather than an escaped string
• Improved startup recovery and system state table
• Reduced memory and cycles by using spl_object_id instead of spl_object_hash
• Logs and exit if a rule throws
• Support setting process names for child processes