Add support for `--enable-framework` (#55, #99)
Add support for `--enable-framework` (#55, #99)

```
$ env PYTHON_CONFIGURE_OPTS="--enable-framework" pyenv install 3.3.2
```

BanzaiMan/pyenv,pyenv/pyenv,VShangxiao/pyenv,habinmusic/pyenv,cehoffman/pyenv,yyuu/pyenv,chenfengyuan/pyenv,syndbg/goenv,lepture/pyenv,UCASREN/pyenv,dongguangming/pyenv,syndbg/goenv,sebhahn/pyenv,yeonsh/pyenv,fly19890211/pyenv,habinmusic/pyenv,rowhit/pyenv,takluyver/pyenv,obimod/pyenv,syndbg/goenv,dongguangming/pyenv,BanzaiMan/pyenv,lozybean/pyenv,cehoffman/pyenv,kevinburke/pyenv,lozybean/pyenv,obimod/pyenv,syndbg/goenv,genome-vendor/pyenv,sebhahn/pyenv,kevinburke/pyenv,recruit-mtl/pyenv,VShangxiao/pyenv,pyenv/pyenv,genome-vendor/pyenv,chenfengyuan/pyenv,yeonsh/pyenv,fly19890211/pyenv,zmwangx/pyenv,dnsd/pyenv,blueyed/pyenv,recruit-mtl/pyenv,UCASREN/pyenv,sebhahn/pyenv,hlecuanda/pyenv,zmwangx/pyenv,yyuu/pyenv,rowhit/pyenv,takluyver/pyenv,xshwy/pyenv,lepture/pyenv,hlecuanda/pyenv,pyenv/pyenv,xshwy/pyenv,dnsd/pyenv