Add maintenance mode notice

Author: tomsmeding

README.md

@@ -25,7 +25,12 @@ For important information on installing on Windows, see:
 
 ## Missing functionality
 
-An incomplete list of missing bindings. Pull requests welcome!
+_This library is currently in **maintenance mode**. While we plan to release
+updates to keep the existing interface working with newer CUDA versions (as
+long as the underlying APIs remain available), no binding of new features is
+planned at the moment. Get in touch if you want to contribute._
+
+Here is an incomplete historical list of missing bindings. Pull requests welcome!
 
 ### CUDA-9
 

cuda.cabal

@@ -39,6 +39,11 @@ Description:
     For additional notes on installing on Windows, see:
     .
     * <https://github.com/tmcdonell/cuda/blob/master/WINDOWS.md>
+    .
+    This library is currently in __maintenance mode__. While we plan to release
+    updates to keep the existing interface working with newer CUDA versions (as
+    long as the underlying APIs remain available), no binding of new features is
+    planned at the moment. Get in touch if you want to contribute.
 
 License:                BSD3
 License-file:           LICENSE