Added 3 new skins

Skins can be viewed by choosing "Select a Skin".

Note: Skins can only be changed in campaign mode after completing campaign mode once.
In multiplayer mode, they can be changed from the beginning.

3 New Skins

• F-2A 6SQ 60th Anniversary Skin
• F-15J Komatsu Special Mark 2017 Skin
• 301SQ F-4 Final Year 2020 Skin

Added 6 new BGM tracks for multiplayer mode

• Mayhem (Roca Roja)
• Rendezvous (Fort Grays Island)
• Blockade (Yinshi Valley, Night)
• Glacial Skies (Waiapolo Mountains)
• Transparent Blue (Yinshi Valley, Morning)
• Naval Warfare (Anchorhead Bay)

The following adjustments were made:

• Miscellaneous text updates.
• Updated the skin design of some aircraft.
• Fixed other minor issues.