cap tasks to invoke bundler

bundler.rb

namespace :bundler do  
  task :create_symlink, :roles => :app do
  set :bundle_dir, File.join(release_path, 'vendor/bundle')

  shared_dir = File.join(shared_path, 'bundle')
  run "rm -rf #{bundle_dir}" # in the event it already exists..?
  run("mkdir -p #{shared_dir} && ln -s #{shared_dir} #{bundle_dir}")
end

task :bundle_new_release, :roles => :app do
  bundler.create_symlink
  run "cd #{release_path} ; bundle install #{bundle_dir} --disable-shared-gems --without test"
  end
end