Update to work with Faraday 0.9.

The latest version of Faraday introduced a breaking change. This updates
it to work with the middleware registration changes.
Update to work with Faraday 0.9.

The latest version of Faraday introduced a breaking change. This updates
it to work with the middleware registration changes.
Update to attempt to use 0.8 or 0.9 Faraday.

These changes should work with either the 0.8 or 0.9 Faraday releases.
Merge branch 'master' of github.com:johnbellone/ridley into john-master

Conflicts:
	ridley.gemspec
Merge branch 'john-master' into issues/outdated-gem-dependency
revert gem dependency