readdir with fallBackToWorkingCopy: Handle the case where a directory that exists in the repo doesn't exist in the working copy.
Fixed var that should have been renamed.
Work around nodegit's bad detection of the path to the working copy.
readdir: Don't break when there's no working copy and the directory does exist in the repository.
stat/lstat: Don't call the callback twice when the file doesn't exist in the repo.
Test: Copy testRepo.git instead of relying on a symlink. Causes less problems with nodegit.
Release 0.2.1.