visit the demo itself gmaps-rails-demo.bytefilia.com/
Requires rails version 4 www.digitalocean.com/community/articles/how-to-install-ruby-on-rails-on-ubuntu-12-04-lts-precise-pangolin-with-rvm
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After that you should instal node js
sudo apt-get install nodejs
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Install all the gems
bundle install
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migrate the sqlite db
rake db:migrate RAILS_ENV=development
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compile assets
bundle exec rake assets:precompile