README.md in qonfig-0.3.0 vs README.md in qonfig-0.4.0

@@ -32,10 +32,11 @@
 - [Settings as Predicates](#settings-as-predicates)
 - [Load from YAML file](#load-from-yaml-file)
 - [Load from ENV](#load-from-env)
 - [Load from \_\_END\_\_](#load-from-__end__) (aka `load_from_self`)
 - [Smart Mixin](#smart-mixin) (`Qonfig::Configurable`)
+- [Plugins](#plugins)
 
 ---
 
 ### Definition and Access
 
@@ -685,9 +686,21 @@
 
 GeneralApplication.config.to_h
 { 'user' => '0exp', 'pswd' => '123test', 'db' => { 'adapter' => 'pg' } }
 
 # and etc... (all Qonfig-related features)
+```
+
+---
+
+### Plugins
+
+```ruby
+# --- show names of registered plugins ---
+Qonfig.plugins # => array of strings
+
+# --- load specific plugin ---
+Qonfig.plugin(:plugin_name) # or Qonfig.plugin('plugin_name')
 ```
 
 ---
 
 ## Contributing