Refer to other project-specific files at top-level

Having the include statements here will hopefully lead to others
quickly finding the list of prerequisite files needed to build.

CMakeLists.txt

@@ -15,6 +15,15 @@ set (doxy_dir "Documentation")
 set (${project}_MODULE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules")
 list (APPEND CMAKE_MODULE_PATH ${${project}_MODULE_DIR})
 
+# list of prerequisites for this particular project; this is in a
+# separate file (in cmake/Modules sub-directory) because it is shared
+# with the find module
+include (${project}-prereqs)
+
+# read the list of components from this file (in the project directory);
+# it should set various lists with the names of the files to include
+include (CMakeLists_files.cmake)
+
 macro (prereqs_hook)
 endmacro (prereqs_hook)