Add issuing entity to Montenegro [解決]

For what I can see, Montenegro seems to miss a few issuing entities. For what I can find on Banknote Museum and Moneypedia, it should be:

English: Treasury

Example note: N#212515

English: Military Government District Command

"Local" language: Imperial and Royal Military General Government District Command

Example note: P# M1: N#209335

English: Austro-Hungarian Military Administration in Montenegro

“Local” langugae: K.u.k. Militärverwaltung In Montenegro

Example note: N#257708

Sources:

https://www.moneypedia.de/index.php/Signatur:_Montenegro

http://www.banknote.ws/COLLECTION/countries/EUR/MNG/MNG.htm

Done, thanks!