ENH: try to detect encoding via sys.stdout first, then sys.stdin

when redirected to a file stdout is None, in ipython zmq frontends
stdin is None, and stdout (only recently in 0.14) is utf-8.

ipython/ipython#2500

pandas/core/format.py

@@ -1274,11 +1274,11 @@ def detect_console_encoding():
 
     encoding = None
     try:
-        encoding=sys.stdin.encoding
+        encoding = sys.stdout.encoding or sys.stdin.encoding
     except AttributeError:
         pass
 
-    if not encoding or encoding =='ascii': # try again for something better
+    if not encoding or encoding == 'ascii': # try again for something better
         try:
             encoding = locale.getpreferredencoding()
         except Exception: