Support PHP CodeSniffer standards in packages installed outside of the vendor directory.

[echernyavskiy]

Proposed Changes

The aim of this change is to add support for PHP CodeSniffer standards in packages installed outside of the vendor directory. One such example is Drupal's Coder module which is most commonly installed into web/sites/all/modules/contributed/coder where the web directory is on the same level as vendor.

Related Issues

[#63]

[frenck]

This does not change anything, having Coding Standard in your project is already supported, the only limitation is currently the search depth, which is going to be extended if #46 gets merged in.

Secondly, this adds absolute paths, which have proven to be a major pain and have been removed in the past.

Closing this PR. Let us continue the discussion in #63.