These were of the form ensure(std::string, something convertible to bool). Not
sure what the ambiguity was, but ensure(std::string, bool(something)) works
better.

zlib cannot be linked with SAFESEH, which is the VS 2013 default, so every
consumer must set /SAFESEH:NO.
/NODEFAULTLIB:LIBCMT seems to eliminate many duplicate-symbol link errors.

This is mostly Mac and Linux, given rev 6cf8a8cd07c6, save for glui, jsoncpp
and llphysicsextensions_source, which also update Windows.

Apparently in Boost 1.57 with Xcode 6, the combination of Boost.Lambda and
Boost.Function is broken -- Trac ticket 10864:
https://svn.boost.org/trac/boost/ticket/10864
However, Boost.Phoenix provides an acceptable replacement.

For some reason VS 2013 (unlike its predecessors and other current compilers)
needs us to explicitly convert an operator bool() method's return expression
to bool.  :-P

Rename llround(..) to ll_round(..) because of a collision with MS llround (long long round) in VS2013

Update autobuild to point to new (Windows) third poarty libraries we just built and configure for VS2013

Until we get a havok-source package built with new metadata-bearing autobuild,
the package name in autobuild.xml and CMake must agree with the tarball
filename.