Merge pull request #2 from jayvius/master

Documentation/Examples for Writing UFuncs and Generalized UFuncs for Custom DTypes
Fix NPY_NO_DEPRECATED_API include Python includes for numpy-1.7
Fix NPY_NO_DEPRECATED_API include for numpy-1.7
Use numpy.get_include() instead of distutils.system_info.get_info()
Rework quaternion setup.py to use distutils Extension not numpy Configuration
Add npytypes package setup.py and remove subpackage setup.py files
Make rational into a subpackage of npytypes
Add __init__.py for npytypes package and rational sub-package
Change __init__.py imports from relative to absolute for Python 2.x compatibility
Add rational/info.py file to provide subpackage info
Merge pull request #3 from taldcroft/setup

Make npytypes install as a package
Update for python 3