Add all missing flags
Remove unused an.gif (Netherlands Antilles) flag.

The Netherlands Antilles was divided into Bonaire, Saint Eustatius and
Saba (BQ), Curaçao (CW) and Sint Maarten (Dutch part) (SX).
Remove unused cs.gif (Czechoslovakia) flag

Czechoslovakia was divided into Czech Republic (CZ), and Slovakia (SK)
Deleted unused (non-iso coded) flags
Add check for missing flags when countries are updated
Updated German translation
Bump version number