Update CONTRIBUTING.md
fixed problem loading hooks for each plugins and clean code
Merge branch 'master' of https://github.com/sailorjs/sails

* 'master' of https://github.com/sailorjs/sails:
  Update index.js
Merge branch 'master' of https://github.com/balderdashy/sails

* 'master' of https://github.com/balderdashy/sails:
  Update CONTRIBUTING.md