add note about scope of this project

Author: jrieken

README.md

@@ -1,9 +1,11 @@
 # Monaco TypeScript
 
-TypeScript and JavaScript language support for the Monaco Editor.
+Simple TypeScript and JavaScript language support for the Monaco Editor.
 
 ![typescript](https://cloud.githubusercontent.com/assets/5047891/15926623/5262fe08-2e3d-11e6-9b90-1d43fda07178.gif)
 
+*Note* that this project focuses on single-file scenarios and that things like project-isolation, cross-file-features like Ranme etc. are *outside* the scope of this project and not supported.
+
 ## Issues
 
 Please file issues concering `monaco-typescript` in the [`monaco-editor` repository](https://github.com/Microsoft/monaco-editor/issues).