because the zlib.h file has issues

Rely on wrapper to import autobuild functions
Switch to VS 2013

use the llqtwebkit2 repo to get us on modern build machines.

Consistently use /Z7 for archive targets to get debug symbols into
consumers.  On Mac, bring the libz symbols file that was started
in freetype into this repo where it belongs.  These are two
files, manually maintained, that list the global symbols defined
in the libz.a archives (debug and release).  These symbol lists
can then be used in an --unexported-symbols option to prevent
re-export in consumer shared libraries.

special makefiles for that process.  Include the README.Linden
in packages, it's useful to devs (or should be).

End of an experiement in packaging both types of libraries.  It
mostly adds work without material gain.  We'll continue to build
both to test for breakage.  Additional comments on Linux build
environment at Linden and better SDK selection on Mac.

vc10 project files.  Unit tests.  Include .so's on Linux.

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--HG--
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branch : vendor