Install fails due to readme.txt reference in setup.py

[mattupstate]

Another installation problem occurs because the readme.txt can't be found

Downloading/unpacking foursquare
  Downloading foursquare-20120328.tar.gz
  Running setup.py egg_info for package foursquare
    Traceback (most recent call last):
      File "<string>", line 14, in <module>
      File "/Users/mattwright/.virtualenv/flask-social/build/foursquare/setup.py", line 17, in <module>
        long_description=open('./readme.txt', 'r').read(),
    IOError: [Errno 2] No such file or directory: './readme.txt'
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):

  File "<string>", line 14, in <module>

  File "/Users/mattwright/.virtualenv/flask-social/build/foursquare/setup.py", line 17, in <module>

    long_description=open('./readme.txt', 'r').read(),

IOError: [Errno 2] No such file or directory: './readme.txt'