Fix legacy links with 301 redirects

Author: arcivanov

_config.yml

@@ -10,6 +10,7 @@ plugins:
   - jekyll-sitemap
   - jekyll-paginate
   - jekyll-last-modified-at
+  - jekyll-redirect-from
 permalink: "/articles/:categories/:title.html"
 paginate: 5
 paginate_path: "/news/page:num/"

documentation/developing-pybuilder.md

@@ -1,6 +1,7 @@
 ---
 layout: documentation
 title: Developing PyBuilder
+redirect_from: /documentation/developing_pybuilder
 ---
 
 # Running a Full Build

documentation/external-plugin-list.md

@@ -1,6 +1,7 @@
 ---
 layout: documentation
 title: External Plugin List
+redirect_from: /documentation/external_plugin_list
 ---
 
 # {{ page.title }}

documentation/publishing-plugins.md

@@ -1,6 +1,7 @@
 ---
 layout: documentation
 title: Publishing your plugins to PyPI
+redirect_from: /documentation/external_plugins
 ---
 
 # {{ page.title }}

documentation/writing-plugins.md

@@ -1,6 +1,7 @@
 ---
 layout: documentation
 title: Usage Documentation
+redirect_from: /documentation/writing_plugins
 ---
 
 # Writing a plugin

release-notes/index.md

@@ -1,6 +1,7 @@
 ---
 layout: documentation
 title: Release Notes
+redirect_from: /releasenotes
 ---
 
 # Release Notes