Return of the shelter SPY

[Kame]

I think the Shelter SPY should be re-introduced.

Back before 2.2, most spys would spec to use shelter, made possible by popping a nightspider.

Then came 2.2 and the re-balance flop, and now we're stuck with nanites for healing/resists, and I thnik it's fair to say that most players dislike this.
This also makes the 20 PSI levels of the spy almost irrelevant, a shame really, especially when considering how only missions gives PSI xp to spies.

In short, please get us rid of nanites.

[CMaster]

Spies can use deflector and protector now.
They could use absorber with a drug and an imp if PPU reqs were brought down a bit (as I suggest elsewhere).
They don't bother because most people feel the slight resist uptick isn't worth the hassle.