Update the list of CMake builtin commands to that of CMake 3.2.1
Update the list of CMake builtin commands to that of CMake 3.2.1

The new list is taken from CMake documentation:
<http://www.cmake.org/cmake/help/v3.2/manual/cmake-commands.7.html>.

The list of builtins doesn't include the vtk_* commands, so remove them.

In addition, move macro/endmacro from plain commands to control keywords;
that category fits them better.

https://bugzilla.gnome.org/show_bug.cgi?id=746622

cburschka/gtksourceview,cburschka/gtksourceview,GNOME/gtksourceview,GNOME/gtksourceview,uajain/gtksourceview,cburschka/gtksourceview,uajain/gtksourceview,uajain/gtksourceview,GNOME/gtksourceview,GNOME/gtksourceview,uajain/gtksourceview,cburschka/gtksourceview,GNOME/gtksourceview,cburschka/gtksourceview,GNOME/gtksourceview,cburschka/gtksourceview,cburschka/gtksourceview,GNOME/gtksourceview,GNOME/gtksourceview,GNOME/gtksourceview,uajain/gtksourceview,GNOME/gtksourceview,cburschka/gtksourceview,uajain/gtksourceview,GNOME/gtksourceview,GNOME/gtksourceview,uajain/gtksourceview,GNOME/gtksourceview,GNOME/gtksourceview,uajain/gtksourceview,uajain/gtksourceview,uajain/gtksourceview,GNOME/gtksourceview,cburschka/gtksourceview,cburschka/gtksourceview