Update README.md
Update README.md
fix filter function for pidstat
Merge branch 'master' of github.com:square/prodeng

* 'master' of github.com:square/prodeng:
  Update README.md
  Update README.md
Merge branch 'master' of github.com:square/prodeng into s-metrics

* 'master' of github.com:square/prodeng:
  fix filter function for pidstat
  Update README.md
  Update README.md
stuff