Rearranged descriptions.

- Made heartbeat sound cancelling when taking over bot immediate.
- Fixed double heartbeat sound when transitioning chapter.
- Potentially fixed rare issue where health was not updated in the start safe room.
- Added temporary debug chat messages.

Fixed heartbeat sound when going idle or joining spectators.

Fixed heartbeat sound being audible to other players.

- B&W is now applied at 1 permanent HP (heartbeat sound still plays when under 25% health).
- Defibrillator now heals 1 permanent + 99 temporary HP (still B&W).
- Upgraded health effects handling from using events to Thinker function.

Synced Death's Door with its latest version at https://github.com/Tsuey/L4D2-Community-Update/blob/master/root/scripts/vscripts/community5.nut:

- Fixed an issue that caused the mission to fail for Sacrifice type finales when the player presses the final button, by adding a workaround.

Synced Death's Door with its latest version at https://github.com/Tsuey/L4D2-Community-Update/blob/master/root/scripts/vscripts/community5.nut:

- Fixed temporary health decay in the safe room, loading players will no longer decay temp health.
- Fixed B&W state transition when hanging.
- Fixed heartbeat sound on chapter transition.
- Defibrillator now heals 24 permanent + 36 temporary HP (still B&W).
- Safe room respawn now heals 24 permanent + 26 temporary HP (still B&W).
- Safe room transition now heals 80% of the missing HP to half health of living survivors, i.e. 1 -> 40 (never B&W).

Synced Special Delivery and Death's Door with their latest versions at https://github.com/Tsuey/L4D2-Community-Update/tree/master/root/scripts/vscripts:

- Enabled B&W state when under 25% health.
- Fixed heartbeat sound when taking over bot.

Expanded addonDescription and shortened Special Delivery Death's Door's ShortDescription.

Included addonURL0 in addoninfo.txt.