header installation issue breaks build for pyobjc 2.3 and 2.4

Hello all,

I had some trouble installing from source pyobjc 2.3 or 2.4 from the
SVN tag or trunk (respectively), that I seem to have isolated to a
problem with pyobjc-core not installing pyobjc-api.h and
pyobjc-compat.h into EGG-INFO/include.

This causes 'python setup.py install' to fail for other modules.

Here's what I did:
svn co http://svn.red-bean.com/pyobjc/tags/pyobjc-2.3.1/ pyobjc-2.3.1
cd pyobjc-2.3.1/pyobjc-core/
python setup.py install
cd ../pyobjc-framework-Cocoa
python setup.py install
>>> FAIL <<<

The problem is that, as above, those headers aren't installed into
EGG-INFO/include, so they don't show up in the dist info when
pyobjc_setup.py requests it, causing that file to instead write out an
old and incorrect-for-pyobjc-2.3 api header file (and no compat header
file), which then breaks subsequent builds.

I fixed this by manually copying the header files to EGG-INFO/include.
I did not have time to track down why they weren't installed properly
in the first place. I had a similar-looking issue with 2.4 from the
trunk, but I did verify that this fix solved it.

Perhaps I was going about installing things all wrong, but regardless,
I think there's some kind of bug in here. Good luck with that.

Zach

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