add RELEASENOTES.md and missing files

RELEASENOTES.md

@@ -1,3 +1,8 @@
+## 0.24.0
+
+* change from release branch to master
+
+
 ## 0.23.0
 
 * Various small improvements

src/foundation/apple-clang/share/craft/definition.darwin.help/README.md

@@ -0,0 +1,15 @@
+# Xcode compilation with xcodebuild for macOS instead of mulle-objc
+
+When you copy this to `.mulle/etc/craft/definition.darwin` this will disable
+the `PROJECT_DIALECT` setting.
+
+You can then enable xcode (and Apple Foundation) only builds with:
+
+```
+mulle-sde environment --os darwin MULLE_CRAFT_PLATFORMS xcode  # xcode:Default for both
+```
+
+Fine, now you just have to get the **MulleFoundation** out of the compilation
+and link stage.
+
+> MEMO: haven't done this in a long time. may need more experimenting