- Better error reporting.

- Flask now uses application's logger instead of its own.
- ucloud file scanner refactored.

setup.py

@@ -40,6 +40,7 @@ setup(name='ucloud',
           'colorama',
           'sphinx-rtd-theme',
           'etcd3 @ https://github.com/kragniz/python-etcd3/tarball/master#egg=etcd3',
+          'werkzeug'
       ],
       scripts=['scripts/ucloud'],
       data_files=[(os.path.expanduser('~/ucloud/'), ['conf/ucloud.conf'])],