Setupmeta

------------------

* Corrected auto-abstract for non-standard version pins such as ``foo==1.0-rc1+local-part``

* Added more debug tracing to help troubleshoot future issues (``SETUPMETA_DEBUG=1 setup.py ...``)

* Warn if no ``packages`` or ``py_modules`` are defined (empty package)

------------------

* Added support for nested requirements: ``-r foo.txt`` will be now followed

------------------

* Corrected bug: parsing ``PKG-INFO`` files properly

-------------------

* Added ``requirements_from_text()`` and ``requirements_from_file()``

* Use a regex to determine simple pins of the form ``foo==1.0``

* Consistently apply auto-abstraction to ``tests_require`` as well

* Internally use consistent names for ``install_requires``, ``tests_require`` and ``extras_require``

-------------------

* Do not use ``pip`` anymore to parse ``requirements.txt`` (49)

-------------------

* Added command ``uber_egg``, to support creating spark_-like "uber eggs"