moveFile

[Javi]

Hello,

The documentation of **moveFile** says _" If dest already exists, it will be 
overwritten"_, but it raises an exception:
    
    
    .nim(94)            raiseOSError
    Error: unhandled exception: No se puede crear un archivo que ya existe.
    Additional info: "(\"b86257abd65a5deb.tmp\", \"test.txt\")" [OSError]
    
    Run

It seems the flag **_MOVEFILE_REPLACE_EXISTING_** of the Windows function 
**MoveFileEx** is missing.