change pypi classifier to 'beta'

Author: crccheck

setup.py

@@ -20,7 +20,7 @@
     description='A Django app for adding object tools to models',
     long_description=open('README.rst').read(),
     classifiers=[
-        "Development Status :: 3 - Alpha",
+        'Development Status :: 4 - Beta',
         "Framework :: Django",
         "Intended Audience :: Developers",
         "License :: OSI Approved :: Apache Software License",