Start refactoring from something home brew to using Symfony's Console component and some other components via composer.

Requires a `composer install` upon cloning.
Work in progress (sorry)
Continue refactor
Restructure to extend a base command for shared logic
Rewrite gitify extract
Rewrite gitify install:modx on symfony console component (previously install-modx)
Get rid of old command files
Merge branch 'refactor-numero-uno'

Conflicts:
	src/Command/BuildCommand.php