Fixed Medic Backpack Invulnerable

Well, another fix in less than 24h.
(as long as you count sniper glasses a fix)

This was an other stuff that bogged me for a long time.
Since Pyro have a fine invulnerability effect on his O Tank at his back, why does the medic Healing Backpack does not have one? So, I've finally create courage and find the problem. But, since it uses the same .vmt ber effect from the weapons, I had to make a new one and hax it in a new model.

This file content have a normal and a hwm model for the medic.
As log as new effects for his backpack.
(recommend you to use it with the 'Fixed Invuln Players' by Shugo Takahashi)
http://www.fpsbanana.com/skins/74875

To install, simply extract the content to your 'tf' folder at:
C:\Program files\Steam\steamapps\*youusernamehere*\team fortress 2\tf

To change the Medic Backpack back to the original effect,
simply delete the models from the tf\models\player folder.

Enjoy! ^^