Added Medusa!

GAMEPLAY
- Witch Doctor: Fixed Aghanim's Death Ward attacking Familiars and other psuedo heroes.
- Doom: Scorched Earth now only applies damage from Doom himself, not all the units affected by his aura.
- Pudge: Fixed being able to get units stuck using Refresher.
- Keeper of the Light: Fixed Recall interaction with non-hero units.
- Fixed Armlet and Power Treads interaction.

UI
- Added a Haste button to the courier HUD element.
- Added Mid Only game mode for private lobbies (disables other lanes and allows the same hero to be selected).
- The Announcer Share dialog has been replaced with a Shared Content dialog.
- Added a badge to the top bar to count the available shared items.
- If shared content is available in a game, a message is now printed pregame.
- Added Balanced Shuffle button to non-tournament private lobbies.
- Added All Chat private lobby option for enabling voice chat among all players.
- Fixed "Equip" appearing in the right click menu for some chests.

AUDIO
- Fixed hearing the wrong announcer after equipping a new item in the loadout.
- Fixed bugs with muting cobroadcasters causing other sounds to be muted.

BOTS
- The bots are now less likely to push with more heroes than what they deem necessary (less 5-man Dota). Probably needs some tuning.
- Made bots slightly less self-concerned when considering defending an ally. Also made them more likely to jump in if they have a slow or stun.
- Bots that are capable of jungling during the laning phase may now do so.
- If purchasing an item from the secret shop would complete an item, desire for going there is now increased.
- When their next item is purchasable, their desire to farm is signficiantly reduced.
- Fixed bad tuning that was causing bots to almost never farm lanes.
- Improved bot responsiveness to pings on Roshan.
- Bots are now less likely to assume that humans will purchase wards.