Another update

1. bf5d610 docs: zipf figure update by Alexander Afanasyev · 12 years ago
2. 1380010 zipf: Small changes (style and small logic correction) and adding documentation section by Alexander Afanasyev · 12 years ago
3. 5931480 tracers+docs: Correcting compilation and installation of trace helpers by Alexander Afanasyev · 12 years ago
4. e97c607 docs: New example on how to use custom strategy with 2-bottleneck topology by Alexander Afanasyev · 12 years ago
5. e74cc1c docs: Adding forwarding strategy example by Alexander Afanasyev · 12 years ago