Edited Issue: Set the appropriate BOM type for Help Page .cshtml files. [896]

Set the appropriate BOM type for Help Page .cshtml files.

Repro:
1. Create a project using Web API template(C#, 4.5, Razor) in VS 2012 and with project name "MvcWebApiSample啊齄丂"
2. Launch the application and click "API" link on the home page.

Expected: Help page renders correctly.
Actual: Errors (attached snapshot)