May 30, 2013 Patch

{{Patch layout
 * source = http://dev.dota2.com/showthread.php?t=89929
 * source-title = Update Notes - May 29, 2013
 * before = 2013-05-25
 * after = 2013-05-31


 * notes =

Gameplay

 * Fixed illusions being able to upgrade to.

UI

 * Added a spectator popup when Heroes acquire high end items.
 * Added a broadcaster menu (opened by clicking on the dota logo in the top right) that allows broadcasters to send generic stats, queries, and poll results to spectators.
 * The Spectator Smooth Drag setting is now preserved across runs.
 * Added notifications of item purchases in some cases.

Perfomance

 * Fixed a crash when starting replays on 32-bit versions of Windows.
 * Fixed a crash when changing window or screen resolution.
 * Fixed a crash when using alt-tab while running full screen.

Workshop

 * Added Itsy spider courier.
 * Added new set:
 * The Arms of Retribution Set -

Audio
}}
 * Updated cast sound.
 * Add secondary underscore for startup UI.