Hi there! The days before the !gscamp I'm setting up a development environment, reading !gnusocial code and updating my PHP knowledge. I'd be happy to learn 1) where could I read/be exposed to the basic ideas to be productive with !gnusocial code during the camp and 2) I was wondering whether there was something like "virtual environments" for PHP development, ala virtualenv for python or rvm for ruby. Suggestions?