[pypy-issue] Issue #2667: CAPI attribute differences (pypy/pypy)

[Stuart Axon]

New issue 2667: CAPI attribute differences
https://bitbucket.org/pypy/pypy/issues/2667/capi-attribute-differences

Stuart Axon:

With the fixes from here
https://bitbucket.org/pypy/pypy/issues/2627/pythreadstate-missing-curexc_type

Pygame now compiles and installs.

Until now I've put the fixes here on the 'pypy' branch.
https://github.com/stuaxo/pygame/tree/pypy

```
$ git clone https://github.com/stuaxo/pygame.git
$ cd pygame
$ git checkout pypy
$ python setup.py install
```

Running the tests
```
$ python -m pygame.tests --exclude opengl
```