[CS:S] SDK for CS:S?

[ObsidianPlague]

With the release of the TF2 SDK happening very recently, seeing as the rest of the old generation multiplayer source games run on the newest branch with little to no problem (and are just around the same age, if not even older) it'd be nice to have an SDK release for one of them, like CS:S.

[WonderlandWar]

I'd like to see all OB and pre-OB games in the SDK as well.