more readme work

Author: alexandermeindl

README.md

@@ -22,6 +22,7 @@ This is a fork of [redmine_wiki_lists](https://github.com/tkusukawa/redmine_wiki
    ```shell
    cd redmine
    git clone https://github.com/alphanodes/redmine_ref_issues.git plugins/redmine_ref_issues
+   bundle config set --local without 'development test'
    bundle install
    ```
 
@@ -242,7 +243,22 @@ If you want to contribute to this plugin, please create a Pull Request.
 ## License
 
 This plugin is licensed under the terms of GNU/GPL v2.
-See LICENSE for details.
+See [LICENSE](LICENSE) for details.
+
+## Redmine Copyright
+
+The redmine_ref_issues is a plugin extension for Redmine Project Management Software, whose Copyright follows.
+Copyright (C) 2006-  Jean-Philippe Lang
+
+Redmine is a flexible project management web application written using Ruby on Rails framework.
+More details can be found in the doc directory or on the official website <http://www.redmine.org>
+
+This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 
 ## Credits