First, install Bundler if you haven't done so already:
gem install bundler
Next clone the repo and install the dependencies:
git clone git@github.com:pietvanzoen/fieldstoneld.git
cd fieldstoneld
bundle install
Use middleman's server command to run a local server that will watch for updates and live reload your browser:
bundle exec middleman server
To generate a new portfolio item:
bundle exec rake portfolio['portfolio item title']
To deploy to github pages, commit all changes to the master branch then:
bundle exec middleman deploy