Building a Windows standalone executable

1. Install Ruby 2.0.0 from http://rubyinstaller.org/downloads

2. Download and extract ruby developer kit from http://rubyinstaller.org/downloads

3. Open ruby command prompt from start menu

4. Run devkitvars.bat from extracted developer kit in ruby command prompt

5. gem install pact

6. gem install ocra

7. gem install json

8. gem install ioconsole

9. Go to gem directory (on my machine C:\Rub200\lib\ruby\gems\2.0.0\gems\pact-1.3.3\bin\

   $ ocra pact