CB-5908: add notice about file usage
Make it clear to developers that these files do not automatically flow into
a new project created with the CLI. This should get corrected when support
for icons and splashscreens is added to the CLI.
diff --git a/res/README.md b/res/README.md
new file mode 100644
index 0000000..caa8d09
--- /dev/null
+++ b/res/README.md
@@ -0,0 +1,8 @@
+Note that these image resources are not copied into a project when a project
+is created with the CLI. Although there are default image resources in a
+newly-created project, those come from the platform-specific project template,
+which can generally be found in the platform's `template` directory. Until
+icon and splashscreen support is added to the CLI, these image resources
+aren't used directly.
+
+See https://issues.apache.org/jira/browse/CB-5145
