Desplegando proyecto basado en Ruby. Ejecutamos # bundle install y nos da el error Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension. /usr/local/rvm/rubies/ruby-1.9.3-p362/bin/ruby extconf.rb checking for libxml/parser.h… no —– libxml2 is missing. please visit http://nokogiri.org/tutorials/installing_nokogiri.html for help with installing dependencies.