Merge pull request #1330 from TehShrike/patch-1

Documentation: adding enhancer to createStore signature

docs/api/createStore.md

@@ -1,4 +1,4 @@
-# `createStore(reducer, [initialState])`
+# `createStore(reducer, [initialState], [enhancer])`
 
 Creates a Redux [store](Store.md) that holds the complete state tree of your app.  
 There should only be a single store in your app.