Sleek Gold Loot 2.5.1

• Updated compatibility for World of Warcraft Retail 12.1.5 (interface 120105).
• Added the Retail 12.1.5 game version to the CurseForge release.
• Reviewed the money, item-value and addon-compartment APIs used by the addon against the 12.1.5 UI documentation.

Includes the permanent animated gold balance introduced in 2.5.0. Open /sga → Gold Balance to enable it.