nidaqmx doesn't work on Python 2.7.13

[Wondernutz]

There is an issue in Python 2.7.13 where _ctypes.LoadLibrary no longer accepts Unicode objects. This will be patched in 2.7.14, but for now users should downgrade to 2.7.12 to use the nidaqmx package.

[epage]

Its mid-2017 and I'm not seeing much chatter about Python 2.7.14.

For nixnet we had the following problems

• Like nidaqmx, 2.7.13's ctypes didn't accept unicode (Exception when loading DLL nixnet-python#127)
• 2.7.7 is the first release where the struct module supported unicode (Exception on import of _frames nixnet-python#116)

We found that just removing unicode_literals was sufficient to get nixnet working in all 2.7 versions without any downsides.

See ni/nixnet-python#129