add a way to disable rules

[ichiriac]

Like explained here, it would be cool to have a way to disable some rules.

• [ ] Enable from the API to exclude a ruleset or a specific rule (entirely)
• [ ] Enable to ignore a ruleset or a specific rule on a portion of code (class, function, line)

Could be found from phpMd here : https://phpmd.org/documentation/suppress-warnings.html

Ignore directive from jslint : http://jshint.com/blog/new-in-jshint-oct-2013/

PhpCS ignore directive : https://pear.php.net/manual/en/package.php.php-codesniffer.advanced-usage.php

[DaGhostman]

Putting this on hold since it is blocked until rules are implemented

[DaGhostman]

Check #5 for progress