Reworks question answer code (not yet quite localize friendly), but much clearer, faster, and shorter. Adds a Config.php flag to toggle on or off qa system. Adds a new summarization length. Adds timing code to test page options for qa system. Fixes a use of list() in Fetcher that could cause a crash. Adds code to make root purchase of ad credits easier, a=chris

Reworks question answer code (not yet quite localize friendly), but much clearer, faster, and shorter. Adds a Config.php flag to toggle on or off qa system. Adds a new summarization length. Adds timing code to test page  options for qa system. Fixes a use of list() in Fetcher that could cause a crash. Adds code to make root purchase of ad credits easier, a=chris