Run build script on deploy

Rakefile

   puts `rsync -rv ./Rakefile #{username}@#{hostname}:/var/www/vlv-search/`
   puts `rsync -rv ./Gemfile #{username}@#{hostname}:/var/www/vlv-search/`
   puts `rsync -rv ./Gemfile.lock #{username}@#{hostname}:/var/www/vlv-search/`
+  puts `ssh #{username}@#{hostname} 'cd /var/www/vlv-search; rake build'`
   puts `ssh #{username}@#{hostname} '~/restart-unicorn'`
 end