init blackboard_hangout.xml
adding hangout wrapper and script
adding blackboard_hangout.xml controller
adding absolute path (//ruby-dev-intro.herokuapp.com) to css file
adding absolute path (//ruby-dev-intro.herokuapp.com) to js files
adding Access-Control-Allow-Origin to get /teacher_current_slide
set SERVER_PATH to '//ruby-dev-intro.herokuapp.com' for blackboard hangout
add '//ruby-dev-intro.herokuapp.com' to ace editor path, for blackboard hangout. Extract the line from generator_input.rb
adding Access-Control-Allow-Origin to '/code_get_last_teacher_run/*' and '/code_run_result_blackboard/*'
backup database
put id minimum to 50