Callout: fixed issue where callout shouldn't have resized its content, but did due to floating point errors
Callout: properly repositions when the content resizes (closes #866)
TextBlockTextRenderer: fixed issue where the text renderer would get into an infinite loop while attempting to truncate (closes #865)
docs fixes
StageTextTextEditor: properly measures with no text
TextInput: support for vertical alignment (and the new default is middle) (closes #860)