The typescript language service in VS doesn't consider tsconfig's types entry

[Tragetaschen]

TypeScript Version: 2.0.0-beta / "2.0.0.0" in Help -> About

Code

"devDependencies": {
  "@types/jquery": "1.10.27",
  "typescript": "2.0.0"
}

{
    "compilerOptions": {
        "types": ["jquery"]
    }
}

var a: JQuery;

Running tsc on the command line works as expected. When I remove for example the "jquery" entry from the types array in tsconfig.json I get the appropriate error for a.

Expected behavior:
Opening the ts file in Visual Studio 2015 with 2.0.0-beta installed should show no errors.

Actual behavior:
VS complains about the type JQuery not known. When I manually add a

/// <reference types="jquery" />

VS stops complaining.

[mhegazy]

typeRoots does not seem to be honored either.