pysparse isn't python-3 compatible

[yurivict]

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "setup.py", line 26
    print 'setuptools module not found.'
                                       ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print('setuptools module not found.')?
*** Error code 1

python-2,7 is EOLed and is going to be removed.
The FreeBSD port is going to be removed as well.