fix plugin generator script name of USAGE on Rails3

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@10286 e93f8b46-1217-0410-a6f0-8f06a7374b81

lib/generators/redmine_plugin/USAGE

@@ -2,7 +2,7 @@ Description:
     The plugin generator creates stubs for a new Redmine plugin.
 	
 Example:
-    ./script/generate redmine_plugin meetings
+    ./script/rails generate redmine_plugin meetings
       create  plugins/meetings/README.rdoc
       create  plugins/meetings/init.rb
       create  plugins/meetings/config/routes.rb

lib/generators/redmine_plugin_controller/USAGE

@@ -2,4 +2,4 @@ Description:
     Generates a plugin controller.
 
 Example:
-    ./script/generate redmine_plugin_controller meetings pools index show vote
+    ./script/rails generate redmine_plugin_controller meetings pools index show vote

lib/generators/redmine_plugin_model/USAGE

@@ -2,4 +2,4 @@ Description:
     Generates a plugin model.
 
 Examples:
-    ./script/generate redmine_plugin_model meetings pool
+    ./script/rails generate redmine_plugin_model meetings pool