Try to fix pip installation issues in #130.

setup.py

@@ -10,7 +10,6 @@
     from ez_setup import use_setuptools
     use_setuptools()
 
-from distutils.command.install import INSTALL_SCHEMES
 from distutils.command.install_headers import install_headers
 from setuptools import find_packages
 from setuptools import setup
@@ -35,7 +34,7 @@
     'Programming Language :: Python :: 3.4',
     'Topic :: Scientific/Engineering',
     'Topic :: Software Development']
-NAMESPACE_PACKAGES = ['scikits', 'skcuda']
+NAMESPACE_PACKAGES = ['scikits']
 PACKAGES =           find_packages()
 
 on_rtd = os.environ.get('READTHEDOCS', None) == 'True'
@@ -56,11 +55,6 @@
     if os.path.exists('MANIFEST'):
         os.remove('MANIFEST')
 
-    # This enables the installation of __init__.py files in namespace
-    # directories as a data file:
-    for scheme in INSTALL_SCHEMES.values():
-        scheme['data'] = scheme['purelib']
-
     setup(
         name = NAME,
         version = VERSION,
@@ -73,10 +67,6 @@
         url = URL,
         namespace_packages = NAMESPACE_PACKAGES,
         packages = PACKAGES,
-
-        # Force installation of __init__.py in namespace package:
-        data_files = [('scikits', ['scikits/__init__.py']),
-                      ('skcuda', ['skcuda/__init__.py'])],
         include_package_data = True,
         install_requires = install_requires,
         tests_require = tests_require,