".NET" bindings. This file is required for Monodevelop to find the
bindings because Monodevelop uses pkg-config to find packages
(it doesn't use the GAC).
For lack of a better name the GAC (and pkg-config) package name is now
``Microsoft.Z3.Sharp``. I don't want to call it ``Microsoft.Z3`` because
someone may want to create a ``Microsoft.Z3.pc`` file in the future for
the native Z3 library (i.e. C++ or C bindings).
In addition there is a new utility function ``configure_file()``
which reads a template file, applies some substitutions and writes
the result to another file. This very similar to what CMake does.
There is a new environment variable ``Z3_INSTALL_PKGCONFIG_DIR``
which allows pkgconfig directory to be controlled for the install.