Merge pull request #2 from AstRonin/cluster

Cluster

added release params

fixed start pool by supervisor, added compare tests with nginx, other…

… improvements

Merge branch 'master' of https://github.com/AstRonin/sgi

Conflicts:
	README.md

big speed impruves, added sample2, added docs

added dynamic ad of connections, refactoring of arbiter

added docs about balancing

small fix