fix install error on Windows

MANIFEST.in

@@ -0,0 +1 @@
+include requirements-dev.txt

pydu/__init__.py

@@ -2,7 +2,7 @@
 Useful data structures, utils for Python.
 """
 
-__version__ = '0.1.0'
+__version__ = '0.1.1'
 
 
 # Set logging handler to avoid "No handler found" warnings.

requirements-dev.txt

@@ -1,3 +1,4 @@
-pytest
+pytest>=2.8.0
+pytest-xdist
 coveralls
 HTTPretty==0.8.14

setup.cfg

@@ -1,2 +1,5 @@
-[aliases]
-test=pytest
+[bdist_wheel]
+universal = 1
+
+[metadata]
+license_file = LICENSE.txt

setup.py

@@ -1,5 +1,37 @@
+import sys
 from pydu import __version__
 from setuptools import setup, find_packages
+from setuptools.command.test import test as TestCommand
+
+
+class PyTest(TestCommand):
+    user_options = [('pytest-args=', 'a', "Arguments to pass into py.test")]
+
+    def initialize_options(self):
+        TestCommand.initialize_options(self)
+        try:
+            from multiprocessing import cpu_count
+            self.pytest_args = ['-n', str(cpu_count()), '--boxed']
+        except (ImportError, NotImplementedError):
+            self.pytest_args = ['-n', '1', '--boxed']
+
+    def finalize_options(self):
+        TestCommand.finalize_options(self)
+        self.test_args = []
+        self.test_suite = True
+
+    def run_tests(self):
+        import pytest
+
+        errno = pytest.main(self.pytest_args)
+        sys.exit(errno)
+
+
+test_requirements = []
+for line in open('requirements-dev.txt'):
+    requirement = line.strip()
+    if requirement:
+        test_requirements.append(requirement)
 
 
 setup(
@@ -11,7 +43,8 @@ setup(
     author_email='wangbinxin001@126.com',
     license='MIT License',
     url="https://github.com/Prodesire/pydu",
-    setup_requires=['pytest-runner'],
+    cmdclass={'test': PyTest},
+    tests_require=test_requirements,
     packages=find_packages(),
     classifiers=[
         'Operating System :: OS Independent',