* CMakeLists.txt, builds/cmake/FindHarfBuzz.cmake: Extensive
modernization measures.
* .gitignore: Add build/, as that's the example directory used in
CMakeLists.txt.
This brings up the minimum required CMake version to 2.8.12.
The installation paths follow the GNU defaults now, e.g. installing on a
64 bit host will place binaries into the lib64/ folder on e.g. Fedora.
Symbols are hidden by default (e.g. `-fvisibility=hidden' on GCC).
CMake will no longer look for a C++ compiler.
Library and .so version now match the Autotools build.
Comments in the build file and informational messages now use platform
agnostic example commands.
ftoption.h and ftconfig.h are written directly without a redundant
`-new' copy.
External dependencies are expressed as option()s and will turn up as
such in cmake-gui.
Internal: Properties such as dependencies and include directories are
now privately set on the freetype library instead of globally.
The CPack definitions have been cleaned up, the `make dist' has been
removed. Source packages generated with CPack don't contain Autotools
files and aren't used by the maintainters anyway.
On Windows, src/base/ftver.rc is compiled to decorate the library with
version and copyright information.
A pkg-config file is now generated and installed.
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