deleted

[rystsov]

Implement network mocking with explicit agent simulation:

• system is represented as set of agents and timer
• agents can send messages to other agents
• agents can use timer to make a delayed delivery to simulate network issues
• agent has the tick method which performs a quant of action and yielding control
• simulation is done via a looped iteration through the set and invoking tick for each item
• one iteration defines one quant of time