unicorn 0.4.2

Eric Wong (16):
      Manifest: updates
      Merge unicorn
      test_exec: add test case for per-worker listeners
      Remove set_cloexec wrapper and require FD_CLOEXEC
      All IOs created in workers have FD_CLOEXEC set
      FD_CLOEXEC all non-listen descriptors before exec
      Close std{err,out} redirection targets
      test_upload: fix a race condition in unlink test
      More descriptive process titles
      unicorn_rails: cleanup redundant bits
      test/rails: v2.1.2 + ActiveRecordStore all around
      Use File.basename instead of a regexp
      Add log directories to tests
      unicorn: remove unnecessary lambda generation
      GNUmakefile: "install" preserves unicorn_rails
      unicorn 0.4.2