Merge PR BA Lars

[stefanbschneider]

See Lars' Klenners work & merge what's useful (feel free to discuss): #117

His implementation has:

• Flows with egress nodes
• Link caps
• Call-per-flow mechanics
• Better docs

[stefanbschneider]

This is the repo, where I copied the code. I also made small adjustments to the simulator and algorithms (no functionally breaking changes).

Probably makes sense to check the code here: https://github.com/CN-UPB/distributed-coordination

[stefanbschneider]

Actually, better check my fork: https://github.com/CN-UPB/distributed-coordination/tree/dev

I made a few minor changes there. Nothing spectacular.