DataFrame msgpack objects written from linux cannot be read on windows
eg. on linux:

```
df2 = pandas.DataFrame([['100']], index=[1], columns=['v'])
df2.to_msgpack(r"/mnt/C/temp/p2.msgpack")
```

then on windows:

```
df = pandas.read_msgpack(r"C:\temp\p2.msgpack")
ValueError: Shape of passed values is (1, 1), indices imply (1, 2)
```
