Add docs with messages

Author: TrySound

README.md

@@ -70,6 +70,18 @@ In global mode
 Converts every new local name in #id or .class defintion to global alias.
 By default returns `[name]__[local]---[hash:base64:5]`.
 
+### Messages
+
+postcss-icss-selectors passes result.messages for each local-scoped class or id
+
+```
+{
+  plugin: 'postcss-icss-selectors',
+  type: 'icss-scoped',
+  name: string, // local-scoped identifier
+  value: string // generated global identifier
+}
+```
 
 ## License