Installation instructions for github-pages gem

site/_docs/windows.md

@@ -44,3 +44,74 @@ with Windows. Add the following to the Gemfile for your site:
 {% highlight ruby %}
 gem 'wdm', '~> 0.1.0' if Gem.win_platform?
 {% endhighlight %}
+
+### How to install github-gem
+
+This section is part of an article written by [Jens Willmer][jwillmerPost]. To follow the instructions you need to have [Chocolatey][] installed on your system. If you already have a version of Ruby installed you need to uninstall it before you can continue.
+
+#### Install Ruby and Ruby development kit
+
+Open a command prompt and execute the following commands:
+
+ * `choco install ruby -version 2.2.4` 
+ * `choco install ruby2.devkit` - _needed for compilation of json gem_
+ 
+#### Configure Ruby development kit 
+
+The development kit did not set the environment path for Ruby so we need to do it.
+ 
+ * Open command prompt in `C:\tools\DevKit2` 
+ * Execute `ruby dk.rb init` to create a file called `config.yml`
+ * Edit the `config.yml` file and include the path to Ruby `- C:/tools/ruby22`
+ * Execute the following command to set the path: `ruby dk.rb install`
+
+#### Nokogiri gem installation
+
+This gem is also needed in the github-gem and to get it running on Windows x64 we have to install a few things.
+
+
+**Note:** In the current [pre release][nokogiriFails] it works out of the box with Windows x64 but this version is not referenced in the github-gem.
+
+
+`cinst -Source "https://go.microsoft.com/fwlink/?LinkID=230477" libxml2`{:.language-ruby}
+
+`cinst -Source "https://go.microsoft.com/fwlink/?LinkID=230477" libxslt`{:.language-ruby}
+
+`cinst -Source "https://go.microsoft.com/fwlink/?LinkID=230477" libiconv`{:.language-ruby}
+ 
+```language-ruby
+ gem install nokogiri --^
+   --with-xml2-include=C:\Chocolatey\lib\libxml2.2.7.8.7\build\native\include^
+   --with-xml2-lib=C:\Chocolatey\lib\libxml2.redist.2.7.8.7\build\native\bin\v110\x64\Release\dynamic\cdecl^
+   --with-iconv-include=C:\Chocolatey\lib\libiconv.1.14.0.11\build\native\include^
+   --with-iconv-lib=C:\Chocolatey\lib\libiconv.redist.1.14.0.11\build\native\bin\v110\x64\Release\dynamic\cdecl^
+   --with-xslt-include=C:\Chocolatey\lib\libxslt.1.1.28.0\build\native\include^
+   --with-xslt-lib=C:\Chocolatey\lib\libxslt.redist.1.1.28.0\build\native\bin\v110\x64\Release\dynamic
+```
+
+#### Install github-gem
+
+ * Open command prompt and install [Bundler][]: `gem install bundler`
+ * Create a file called `Gemfile` without any extension in your root directory of your blog
+ * Copy & past the two lines into the file:
+ 
+ 
+```language-ruby
+source 'http://rubygems.org'
+gem 'github-pages'
+```
+
+ * **Note:** We use an unsecure connection because SSL throws exceptions in the version of Ruby
+ * Open a command prompt and install github-pages: `bundle install`
+
+ 
+After this process you should have github-pages installed on your system and you can host your blog again with `jekyll s`. \\
+There will be a warning on startup that you should include `gem 'wdm', '>= 0.1.0' if Gem.win_platform?` to your `Gemfile` but I could not get `jekyll s` working if I include that line so for the moment I ignore that warning.
+
+In the future the installation process of the github-gem should be as simple as the setup of the blog. But as long as the new version of the Nokogiri ([v1.6.8][nokogiriReleases]) is not stable and referenced, it is work to get it up and running on Windows. 
+ 
+[jwillmerPost]: http://jwillmer.de/blog/tutorial/how-to-install-jekyll-and-pages-gem-on-windows-10-x46 "Installation instructions by Jens Willmer"
+[Chocolatey]: https://chocolatey.org/install "Package manager for Windows"
+[Bundler]: http://bundler.io/ "Ruby Dependencie Manager"
+[nokogiriReleases]: https://github.com/sparklemotion/nokogiri/releases "Nokogiri Releases"
+[nokogiriFails]: https://github.com/sparklemotion/nokogiri/issues/1456#issuecomment-206481794 "Nokogiri fails to install on Ruby 2.3 for Windows"