Update PopUpManager.as

hi, I found "root setter" function has a issue.
...
var popUp:DisplayObject = popUps[i];
var overlay:DisplayObject = DisplayObject(POPUP_TO_OVERLAY[i]);
...

the overlay always return null, I think because 'POPUP_TO_OVERLAY[i]' should be 'POPUP_TO_OVERLAY[popUp]';
AIR 3.8 support
updated release notes for 1.1.1
updated release notes for 1.1.1
updated release notes for 1.1.1
Targets SWF version 18 (FP 11.5 and AIR 3.5) in builds to support BB10
Text Editors: visibility fixes when text is empty (closes #693)
GroupedList: fixed null reference on item renderer maps when changing item renderers (closes #688)
Item renderers: accessory is cleared if itemHasAccessory is set to false (closes #689)
Merge pull request #692 from lynxerzhang/patch-1

Fixed issue where changing PopUpManager root failed to transfer overlays.
Merge branch 'master' of github.com:joshtynjala/feathers
Drawers: can touch docked drawers (in addition to the content) to close an open drawer (closes #685)
Drawers: simplified last commit, hitArea is used as a fallback if no children are touched (similar to Scroller)
List, GroupedList: selection cleared on data provider change, similar to scroll position being reset to 0,0 (closes #695)
List, GroupedList: updated docs to warn about scroll position resets and selection clearing on data provider change
GroupedList: updateItemAt() with a single index will properly update all renderers in a group
ComponentsExplorer: fixed typos
BitmapFontTextRenderer: uses QuadBatch's batchable property instead of switching between a QuadBatch and separate images. Where the batchable QuadBatch replaces separate images, BitmapFontTextRenderer will perform significantly better with longer text (references #629)
BitmapFontTextRenderer: avoid calls to push()
Scale9Image: uses QuadBatch's batchable property instead of switching between a QuadBatch and separate images. Where the batchable QuadBatch replaces separate images, Scale9Image will perform better (references #629)