add pypi long description

Author: theblackcat102

setup.py

@@ -72,6 +72,10 @@ def find_libxml2_include():
               language="c++"),
 ]
 
+this_directory = os.path.abspath(os.path.dirname(__file__))
+with open(os.path.join(this_directory, 'README.md'), encoding='utf-8') as f:
+    long_description = f.read()
+
 setup(
     name='extractnet',
     version='1.0.4',
@@ -82,6 +86,8 @@ def find_libxml2_include():
     license='MIT',
     platforms='Posix; MacOS X',
     keywords='automatic content extraction, web page dechroming, HTML parsing',
+    long_description=long_description,
+    long_description_content_type='text/markdown',
     classifiers=[
         'License :: OSI Approved :: MIT License',
         'Development Status :: 5 - Production/Stable',