Roman Coins

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- Replaced the image of some coins
- Added 5 Antoninians of Aurelian
- Added Aureus Aurelian
- Added 1 Antoninian Elagabalus
- Added 1 denarius of Lucius Verus
- Added 1 denarius of Alexander Severus
- Added 1 Antoninian Trajan Decius
- Added 1 Antoninian Gordian 3
- Fixed known errors in descriptions
- Added rarity degrees, for some coins (according to RIC)
- Updated libraries