added get-interface-stats console script

setup.py

@@ -20,7 +20,8 @@ setup(
     ],
     entry_points={
         'console_scripts': [
-            'brian-polling-manager=brian_polling_manager.main:cli'
+            'brian-polling-manager=brian_polling_manager.main:cli',
+            'get-interface-stats=brian_polling_manager.interface_stats.cli:main'
         ]
     },
     include_package_data=True,