Adding a quick stab at the TTS version of the installed application
Removing the lasterror, checking on the events.
Make the in-app payments sample a bit more flexible by allowing the user to specify their own JWT.
don't have a default jwt for production
Update clock dart packaged app example for a modern dart.

This change allows the clock to run in Dartium m31, or in Chrome,
without changes.

Changes:
 dart2js no longer accepts --disallow-unsafe-eval
 window.requestLayoutFrame is now scheudleMicrotask from dart:async.
 Date is now DateTime
 List<E>.filter is now List<E>.removeWhere
 String.charCodeAt is now String.codeUnitAt
 js/interop stuff no longer required

Bugfix: Fix numbers not showing up at all when first opened, e.g., at
exactly 4pm and now.minute == 0.

Review URL: https://codereview.appspot.com/56440043
Changed tts name
Addressed Mike's feedback
Fixed lots of nits
Fixes indents
[identity] Bumped manifest version
fixed minor issue in comment.
Added zoom and find buttons
Implemented the zoom box.
Implemented the find box.
Added matchCase functionality to the find box.
Added incremental find
Find box moves out of the way or becomes translucent
Made the find bar not obscure active matches, and some other small improvements
Added zoom in and out buttons and ctrl+f shortcut
Added keyboard shortcuts for zoom