Allow users to have multiple configuration files

Eve-O-Preview/Configuration/ThumbnailConfig.cs

@@ -5,13 +5,10 @@ using Newtonsoft.Json;
 
 namespace EveOPreview.Configuration
 {
-	public class ThumbnailConfig : IThumbnailConfig
+	class ThumbnailConfig : IThumbnailConfig
 	{
 		public ThumbnailConfig()
 		{
-			// Default values
-			this.ConfigFileName = null;
-
 			this.MinimizeToTray = false;
 			this.ThumbnailRefreshPeriod = 500;
 
@@ -43,9 +40,6 @@ namespace EveOPreview.Configuration
 			this.ClientHotkey = new Dictionary<string, string>();
 		}
 
-		[JsonIgnore]
-		public string ConfigFileName { get; set; }
-
 		public bool MinimizeToTray { get; set; }
 		public int ThumbnailRefreshPeriod { get; set; }