Xeno suit changes.

Now you look extremely similar to an actual xeno drone in stalk stance, not some cheap recreation but something you should probably shoot. Goes well with the whole fake-antag-items-to-get-you-shot toy theme we have going.

Also way easier to fool actual aliens with as they never examine each other.

Alien on the left, suit on the right.
http://i.imgur.com/Yi8vfyz.png
Adds myself to admin.txt
Merge pull request #6497 from WJohn/xenosuit

Xeno suit changes