Use NullHandler instead of basicConfig

logging.basicConfig() was propably added to avoid the dreaded "no log handler
found for ..." messages however this is the wrong approach because it interferes
with the log handling in applications using the library, instead libraries
should never set up log handlers and leave it to client application. To avoid
the message, libraries can register the NullHandler though, see for example:

  http://docs.python-guide.org/en/latest/writing/logging/#logging-in-a-library

dxchange/__init__.py

@@ -50,7 +50,7 @@
                         unicode_literals)
 
 import logging
-logging.basicConfig()
+logging.getLogger(__name__).addHandler(logging.NullHandler())
 
 from dxchange.exchange import *
 from dxchange.reader import *