Added a note on submodules, closes #173.

celluloid · May 3, 2016 · 29e0227 · 29e0227
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commit 29e0227
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diff --git a/README.md b/README.md
@@ -81,6 +81,7 @@ Contributing to Celluloid::IO
 -----------------------------
 
 * Fork this repository on github
+* Check out submodules with `git submodule init` and `git submodule update`
 * Make your changes and send me a pull request
 * If I like them I'll merge them
 * If I've accepted a patch, feel free to ask for a commit bit!