Extra check for vendor 3 folders up.

Failure to check up *3* folders when running the binary from
chrisboulton/php-resque/bin/ results in never finding the autoload
file when it tries to load up the composer dependencies.
Merge pull request #82 from JesseObrien/master

Composer Autoload Failure
Fixed the Resque_Worker log method to properly handle NORMAL vs VERBOSE logging.
Merge pull request #90 from cballou/master

Fixed Resque_Worker logging as it would always output verbose messaging.
Merge branch 'master' of github.com:chrisboulton/php-resque into improved-forking