t/testlib/CrazyStatus: add crazy statuses with 'retweeted_status' field.
Main::PSGI::View: now Text::Xslate warn/error messages are logged by BusyBird::Log.
status.tx, View: make status rendering more robust by passing a SafeData status to status.tx. Besides, wrap invocations of config-given builders with try {} block.
View: on second thought, it would be helpful to report errors from user-defined builders. Revised View so that it would report as many errors from builders as possible.
Main: make default status_permalink_builder more robust with SafeData.
Main: rewrite attached_image_urls_builder with SafeData. This is more compact.