specify that PluginClassLoader is a Parent Last ClassLoader - it loads the classes from the plugin's jars before delegating to the parent class loader

README.md

@@ -71,7 +71,8 @@ It's very simple to add pf4j in your application:
 In above code, I created a **DefaultPluginManager** (it's the default implementation for
 **PluginManager** interface) that loads and starts all active(resolved) plugins.  
 Each available plugin is loaded using a different java class loader, **PluginClassLoader**.   
-The **PluginClassLoader** contains only classes found in **PluginClasspath** (default _classes_ and _lib_ folders) of plugin and runtime classes and libraries of the required/dependent plugins. 
+The **PluginClassLoader** contains only classes found in **PluginClasspath** (default _classes_ and _lib_ folders) of plugin and runtime classes and libraries of the required/dependent plugins.  
+This class loader is a Parent Last ClassLoader - it loads the classes from the plugin's jars before delegating to the parent class loader.
 The plugins are stored in a folder. You can specify the plugins folder in the constructor of DefaultPluginManager. If the plugins folder is not specified 
 than the location is returned by `System.getProperty("pf4j.pluginsDir", "plugins")`.
 

pf4j/src/main/java/ro/fortsoft/pf4j/PluginClassLoader.java

@@ -22,6 +22,8 @@ import java.util.List;
 
 /**
  * One instance of this class should be created by plugin manager for every available plug-in.
+ * This class loader is a Parent Last ClassLoader - it loads the classes from the plugin's jars before delegating
+ * to the parent class loader.
  *
  * @author Decebal Suiu
  */