- get the filename

Open.cpp
- open the file & clear the structs in FileSpecs (EkszBox\Open.cpp)
- figure out the format (EkszBox\FormatScan.cpp)
- call correct format read function (EkszBox\Formats\Read\*.*),
  info from file will be read into global structs 'FileSpecs.cpp'
- call extract (EkszBox\Formats\Extract\StdExtract.cpp)