There was a spec that was failing because we removed .attachment_definitions
from models, I expected this to fix it, but apparently it hasn't.

This allows bundler to complete gem dependency resolution during
development. This is only relevant for paperclip developers. Please see:
https://github.com/thoughtbot/paperclip/issues/1256 and thanks to
@nkondratyev

Removes check for potential clashes in attachment paths, per discussion
in #1143.

As of 26f4d409, the default path settings no longer lead to this problem,
and the checker is more likely to generate false than true positives as
it cannot fully expand interpolations.

Add logging section to Readme

Implement djcp's tweaks