Fix templates directory structure to produce correct nupkg output

templates/Microsoft.AspNetCore.SpaTemplates/aurelia/tsconfig.json

@@ -0,0 +1,16 @@
+{
+  "compilerOptions": {
+    "module": "es2015",
+    "moduleResolution": "node",
+    "target": "es5",
+    "sourceMap": true,
+    "experimentalDecorators": true,
+    "emitDecoratorMetadata": true,
+    "skipDefaultLibCheck": true,
+    "strict": true,
+    "lib": [ "es2015", "dom" ],
+    "types": [ "webpack-env" ]
+  },
+  "exclude": [ "bin", "node_modules" ],
+  "atom": { "rewriteTsconfig": false }
+}