Hop (#44)

* update: add hop script

* docs: add hop README

* docs: add doc showing you can explain commands

* style: markdown linting

* style: lint fixes

* style: more lint fixes

* update: fix typo

* style: lint fixes

* style: lint fix for my lint fix

* update: expose phpcbf/phpcs as well

* fix: improper HOP_PATH detection when calling via bin/hop

Author: Jasonej