Add Get Started Section

Added links to "Get Started" section to our documentation and my video tutorial with .NET Core.

Author: kendrahavens

README.md

@@ -13,6 +13,11 @@ Welcome to the C# extension for Visual Studio Code! This preview provides the fo
 
 The C# extension is powered by [OmniSharp](https://github.com/OmniSharp/omnisharp-roslyn).
 
+
+### Get Started Writing C# in VS Code
+* [Documentation](https://code.visualstudio.com/docs/languages/csharp)
+* [Video Tutorial compiling with .NET Core](https://channel9.msdn.com/Blogs/dotnet/Get-started-with-VS-Code-using-CSharp-and-NET-Core)
+
 ### What's New in 1.4
 
 #### Metadata as Source