Module function template used per @sandersn request

types/picturefill/index.d.ts

@@ -14,6 +14,5 @@ declare namespace Picturefill {
 
 declare function picturefill(arg?: Picturefill.EvaluateArg): void;
 
-declare module 'picturefill' {
-  export = picturefill;
-}
+export = picturefill;
+export as namespace picturefill;

types/picturefill/tslint.json

@@ -1,6 +1,3 @@
 {
-  "extends": "dtslint/dt.json",
-  "rules": {
-    "no-single-declare-module": false
-  }
+  "extends": "dtslint/dt.json"
 }