Clutter, like GTK+ and GLib, has recently switched to a visibility-based
method of exporting symbols, so update the Visual Studio build files to
do likewise, by using __declspec (dllexport). This eliminats the need to
use a .def file to export the symbols. The pre-configured
config.h.win32.in is also updated accordingly for this purpose. The
clutter.symbols file can be dropped if it is not being used otherwise.
Split up the property sheets, so that they are easier to maintain, and
clean up the projects and property sheets, especially on items that are
being repeated, and therefore silence many build warnings. Update the
project files correspondingly, and make all project files use Unix line
endings, for easier application of patches (the .sln and README.txt files
still has to have Windows line endings in order to work properly).
Also make the copying of config.h.win32 and clutter-config.h.win32(_GDK)
custom build rules, so that they may also be cleaned during the cleaning
of the build, which makes it easier for one to do a rebuild.
Similar updates to the Visual Studio 2010 project files will follow.
