#145 Overwriting subdirectories returns error

[Luciano Pinheiro]

Sometimes, we need to overwrite an directory wich has
subdirectories on host.
The problem happens when Kbear try to create an
subdirectory. Of course, the subdirectory being created
is already there (on host side). So, Kbear returns an
error.
I think the correct behavior is to ignore this 'error
return' from ftp server and continue task, uploading
files inside directory.