remove request from requirements

Author: uvchik

setup.py

@@ -18,5 +18,4 @@
             'windpowerlib': [os.path.join('data', '*.csv')]},
       zip_safe=False,
       install_requires=['numpy >= 1.7.0',
-                        'pandas >= 0.13.1',
-                        'requests'])
+                        'pandas >= 0.13.1'])