Added VS projects for a11y and libgail-util

Added VS projects for a11y and libgail-util

-Added projects to compile the a11y portion of GTK+.  This is now necessary
 as a11y/GAIL is now integrated into the main GTK+ library, and it must
 be built before compiling/linking GTK+.  This project is done like the
 GDK/GTK+ projects, where the source file listings for the VS2008/2010
 projects are fed into templates (.vcprojin, .vcxprojin and
 .vcxproj.filtersin) during 'make dist'
-Added projects to compile the libgail-util DLL (no templates for this
 as this does not have source files added/removed often)
-Added the new projects into distribution, and headers, DLLs and .LIB files
 into the "install" stage