Update README.md

andrewhickman · web-flow · commit a2fa8d4a554d · 2017-12-08T18:49:14.000Z
diff --git a/README.md b/README.md
@@ -1 +1,3 @@
 # id-map
+
+See also [slab](https://crates.io/crates/slab).

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`1`	`1`	`# id-map`
	`2`	`+`
	`3`	`+See also [slab](https://crates.io/crates/slab).`