Switch root namespace to "RobloxFiles"

In case there are any future libraries written for Roblox in C#, I want to avoid running into any namespace collisions. Its best to keep everything pertaining to this project nested in its own unique namespace.

XmlFormat/XmlPropertyTokens.cs

@@ -4,7 +4,7 @@ using System.ComponentModel;
 using System.Linq;
 using System.Xml;
 
-namespace Roblox.XmlFormat
+namespace RobloxFiles.XmlFormat
 {
     public interface IXmlPropertyToken
     {