Merge pull request #129 from techtonik/develop

Copy include dir into venv under Windows.

virtualenv.py

@@ -41,6 +41,7 @@
 
 is_jython = sys.platform.startswith('java')
 is_pypy = hasattr(sys, 'pypy_version_info')
+is_win  = (sys.platform == 'win32')
 abiflags = getattr(sys, 'abiflags', '')
 
 if is_pypy:
@@ -1039,7 +1040,7 @@ def install_python(home_dir, lib_dir, inc_dir, bin_dir, site_packages, clear):
             logger.info('Deleting %s' % site_packages_filename)
             os.unlink(site_packages_filename)
 
-    if is_pypy:
+    if is_pypy or is_win:
         stdinc_dir = join(prefix, 'include')
     else:
         stdinc_dir = join(prefix, 'include', py_version + abiflags)