Migrate to S4 Classes

Change-Id: I27e9452e9d59f6b414898390074908ec0e91e2a9
diff --git a/RKorAPClient.Rproj b/RKorAPClient.Rproj
index 270314b..6608f32 100644
--- a/RKorAPClient.Rproj
+++ b/RKorAPClient.Rproj
@@ -1,8 +1,8 @@
 Version: 1.0
 
-RestoreWorkspace: Default
-SaveWorkspace: Default
-AlwaysSaveHistory: Default
+RestoreWorkspace: No
+SaveWorkspace: No
+AlwaysSaveHistory: Yes
 
 EnableCodeIndexing: Yes
 UseSpacesForTab: Yes