Completion list for external module

[yuit]

When import external module, we should have a completion list for names of external modules.

[mhegazy]

Some examples:

// file1.d.ts
declare module "externalModule" {

}

// file2.ts
export var x;

// file3.ts
import f = require("| " // <- completion here should show "file2" and "externalModule"

Also note that we need to figure relative path, so if file2.ts was in a directory files, it should have been "./foo/file2"

[NoelAbrahams]

Possible duplicate of #188

[DanielRosenwasser]

Indeed seems like a duplicate of #188.