properly remove folders that are overwritten on "save as"

app/Sketch.java

@@ -736,6 +736,13 @@ public class Sketch {
       }
     } catch (IOException e) { }
 
+    // if the new folder already exists, then need to remove
+    // its contents before copying everything over
+    // (user will have already been warned)
+    Base.removeDir(newFolder);
+    // in fact, you can't do this on windows because it tries
+    // to go into the same folder, but it happens on osx a lot.
+
     // copy the entire contents of the sketch folder
     Base.copyDir(folder, newFolder);
 

todo.txt

@@ -9,6 +9,7 @@ X update the script for the mailing list
 save as... bugs
 X make sure that the sketch folder still exists when doing any operation
 X   otherwise editor gets into a weird state
+X remove a folder if someone tries to replace it via "save as"
 
 pending
 _ rename video.Camera to video.Video ? Capture ?
@@ -55,14 +56,6 @@ file is empty.
 the only way to make File>Save As actually save new files, as far as i
 can tell, is to Save As once, make at least one change, then Save. 
 
-what happens if folder already exists on save as?
-
-saving a project over an already existing project does not get rid of
-the .pde files that arent overwritten.  not sure if this is feature or
-bug, but it took me by surprise.  it seemed to only overwrite .pde
-files with the same name, but everything else in that project folder
-stays as is. 
-
 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .