hqueue 1.0.1

* Make PropEr an optional (test) dependency
Merge pull request #1 from apache/optional-proper

Make PropEr an optional (test) dependency
tree: 5a0c8a1fa25bd9b4c50e8f5c47f80f131193e831
  1. .gitignore
  2. Makefile
  3. README
  4. c_src/
  5. rebar.config.script
  6. src/
  7. test/