Long comment at top of each CMakeLists.txt in src, libraries, modules

libraries/lib-uuid/CMakeLists.txt

libraries/lib-viewport/CMakeLists.txt

libraries/lib-vst/CMakeLists.txt

libraries/lib-wx-init/CMakeLists.txt

libraries/lib-xml/CMakeLists.txt

modules/CMakeLists.txt

modules/etc/CMakeLists.txt

modules/etc/mod-null/CMakeLists.txt

modules/import-export/CMakeLists.txt

modules/import-export/mod-aup/CMakeLists.txt

modules/import-export/mod-cl/CMakeLists.txt

modules/import-export/mod-ffmpeg/CMakeLists.txt

...mport-export/mod-ffmpeg/lib-ffmpeg-support/CMakeLists.txt

modules/import-export/mod-flac/CMakeLists.txt

modules/import-export/mod-lof/CMakeLists.txt

modules/import-export/mod-mp2/CMakeLists.txt

modules/import-export/mod-mp3/CMakeLists.txt

modules/import-export/mod-mpg123/CMakeLists.txt

modules/import-export/mod-ogg/CMakeLists.txt

modules/import-export/mod-opus/CMakeLists.txt