Delete upper limits of packages for further development

Author: SabineHaas

setup.py

@@ -18,5 +18,5 @@ def read(fname):
           'windpowerlib': [os.path.join('data', '*.csv')]},
       long_description=read('README.rst'),
       zip_safe=False,
-      install_requires=['pandas >= 0.19.1, < 0.25 ',
-                        'requests < 3.0'])
+      install_requires=['pandas >= 0.19.1',
+                        'requests'])