Ahodges/doc/relnotes20141021

@mhoeber , @catong , @srpearce please take a look -- anything else to add? 
@explorerleslie , @shnayder ?
@lamagnifica Ah... I thought you meant "Maximum Attempts". Re bolding "Advanced Settings", from what I can see in the doc, it is generally not bold when referred to generically, but IS bolded when it is the UI tab that is referred to, e.g. "click **Advanced Settings**" or "on the **Advanced Settings** page", but not "change the advanced settings in your course"