Edited the setup.py tags to call this a beta release.

Author: karthikcharan83

setup.py

@@ -50,7 +50,7 @@
     zip_safe=False,
     keywords='popgen',
     classifiers=[
-        'Development Status :: 2 - Pre-Alpha',
+        'Development Status :: 2 - Beta',
         'Intended Audience :: Developers',
         'License :: OSI Approved :: Apache Software License',
         'Natural Language :: English',