Merge pull request #53 from dwickern/js-error

fix error transpiling referenced javascript files

Author: chriskrycho

lib/typescript-preprocessor.js

@@ -20,6 +20,7 @@ class TypeScriptPreprocessor {
     // includes, always emit, and let Broccoli manage any outDir.
     this.config = JSON.parse(fs.readFileSync(path.join(process.cwd(), 'tsconfig.json')));
     this.config.compilerOptions.noEmit = false;
+    this.config.compilerOptions.allowJs = false;
     delete this.config.compilerOptions.outDir;
     delete this.config.include;
   }