ssg: ...: use SaveToFile instead of SaveToDisk to keep consistent

src/managed/OpenLiveWriter.BlogClient/Clients/StaticSite/StaticSiteClient.cs

@@ -98,7 +98,7 @@ namespace OpenLiveWriter.BlogClient.Clients.StaticSite
             // Ensure the post has a date
             ssgPost.EnsureDatePublished();
             // Save the post to disk
-            ssgPost.SaveToDisk();
+            ssgPost.SaveToFile();
 
             try
             {

src/managed/OpenLiveWriter.BlogClient/Clients/StaticSite/StaticSitePost.cs

@@ -201,7 +201,7 @@ namespace OpenLiveWriter.BlogClient.Clients.StaticSite
         /// <summary>
         /// Save the post to the correct directory
         /// </summary>
-        public void SaveToDisk()
+        public void SaveToFile()
         {
             // Generate a safe slug if one isn't already generated
             // This ensures we don't overwrite an existing post