* Structure of tasks refactored in PR #17, "symfony:console" command replaces "symfony:command"
  * Commands are only run on servers with release role
  * symfony_env_prod variable renamed to symfony_env
  * app_path is now passed to the build_bootstrap task to allow custom directory `structures (ezpublish)
  * symfony_env is now set correctly for stages other than the default

Thanks to @blaugueux, @mstrzele @patrickli, @KingCrunch & @nifty for their contributions