Current released version does not install via pip on python 3

[andyfaff]

I am trying to install ptemcee on Windows 7 using pip. I get the following error message:

(dev3) F:\programming\refnx>pip install ptemcee
Collecting ptemcee
  Downloading ptemcee-1.0.0.tar.gz
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "C:\Users\anz\AppData\Local\Temp\pip-build-44kz528g\ptemcee\setup.py"
, line 39, in <module>
        long_description=read('README.rst'),
      File "C:\Users\anz\AppData\Local\Temp\pip-build-44kz528g\ptemcee\setup.py"
, line 20, in read
        return f.read()
      File "F:\miniconda\envs\dev3\lib\encodings\cp1252.py", line 23, in decode
        return codecs.charmap_decode(input,self.errors,decoding_table)[0]
    UnicodeDecodeError: 'charmap' codec can't decode byte 0x90 in position 449:
character maps to <undefined>

    ----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in C:\Users\anz\AppD
ata\Local\Temp\pip-build-44kz528g\ptemcee\

It's also causing all my CI on appveyor to fail.