Add deprecation notice to README.

mbostock · Sep 1, 2016 · a1be488 · a1be488
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diff --git a/README.md b/README.md
@@ -1,5 +1,7 @@
 # SMASH
 
+**SMASH DEPRECATED. [DO ROLLUP INSTEAD.](http://rollupjs.org/)**
+
 SMASH TOGETHER FILES! PROBABLY JAVASCRIPT.
 
 SAY THIS foo.js: