CalloutPopUpContentManager: more options, including a custom content factory (closes #336)
Added Callout disposeContent to release notes
release notes require TextFieldTextEditor when using FocusManager
BitmapFontTextFormat: better error message for font argument
DragDropManager: pass correct data on drag complete (closes #442)
Button: avoid NaN dimensions
SimpleScrollBar: avoid NaN dimensions
FeathersControl: setSizeInternal() will not accept NaN for width and height values.
Callout: origin is now a member property and can be changed after showing (closes #261). added DIRECTION_VERTICAL and DIRECTION_HORIZONTAL
Callout: doesn't close itself when origin is touched and callout is non-modal. origin should close callout manually (closes #351)
DropDownPopUpContentManager: ignores touches on source too (source should close manually, if desired).
PickerList: fixed closing condition to require an item renderer (so that a scroll bar doesn't trigger it)
added note about NaN in setSizeInternal() to release notes
FeathersControl: clearer handling of NaN in width and height setters
ScrollText: docs
Callout: docs