Move classes to a sub-package with plugin name.

src/main/java/plugins/authorname/MyEzPlugIcyPlugin.java → src/main/java/plugins/authorname/templateplugin/MyEzPlugIcyPlugin.java

-package plugins.authorname;
+package plugins.authorname.templateplugin;
 
 import java.lang.reflect.InvocationTargetException;
 

src/main/java/plugins/authorname/MyIcyPlugin.java → src/main/java/plugins/authorname/templateplugin/MyIcyPlugin.java

-package plugins.authorname;
+package plugins.authorname.templateplugin;
 
 import java.lang.reflect.InvocationTargetException;