ajbonner/magento-composer-autoload — pull request #3 by rbrown (2014-11-14 13:13:49+00:00)
Title: Add basedir/../ as a location for vendor directory

bootstrapComposer() looks in basedir for the vendor directory, this
patch checks basedir/../vendor as well.

This should probably be set by a post-install script, but this is probably the second most common case.