#11 Fix for Saving Issues under Windows

[M.J.K.]

Some Windows users experience problems when saving one or multiple files. See here and here.

Typically, this is an issue with ExifTool. ExifTool behaves quite strangely under Windows. exiftool(-k).exe is a compressed RAR file that uncompresses itself to the %Temp% directory. This can cause unexpected problems with anti virus tools.

Geotag makes it even worse, since it creates a new ExifTool process for every picture it saves. But that's not necessary. With the -stay_open option of ExifTool you can save multiple pictures with just one ExifTool process.

I therefore implemented the -stay_open feature into Geotag (see the two patches). It seems it solves the saving problems. Apart from that, saving works much faster with only one ExifTool process--under any OS, not just under Windows.