Big cleanup of the build structure.
* configure.ac is divided into distinct sections for programs, headers,
optional components, etc.
* polyp/Makefile.am is organised into several sections instead of a big mess.
* Conditionals are only for adding things to the primaries, not around their
build rules.
* polypcore has been brought up to date in preparation for the Windows port.
It is not possible to use the current tricks there.
git-svn-id: file:///home/lennart/svn/public/pulseaudio/branches/ossman@362
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