Updates sample plugin README.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@2530 e93f8b46-1217-0410-a6f0-8f06a7374b81

extra/sample_plugin/README

@@ -4,13 +4,6 @@ This is a sample plugin for Redmine
 
 == Installation
 
-=== Adding plugin support to Redmine
-
-To add plugin support to Redmine, install engines plugin:
-   See: http://rails-engines.org/
-
-=== Plugin installation
-
 1. Copy the plugin directory into the vendor/plugins directory
 
 2. Migrate plugin:
@@ -18,4 +11,4 @@ To add plugin support to Redmine, install engines plugin:
 
 3. Start Redmine
 
-Installed plugins are listed on 'Admin -> Information' screen.
+Installed plugins are listed and can be configured from 'Admin -> Plugins' screen.