Patch 8.1.5/API changes

Diff: 8.1.0 (29482) to 8.1.5 (29701)
* https://github.com/Gethe/wow-ui-source/commit/93e7041bf9340ca2bcfca8a56feab94ff0bee066
Blizzard Deprecated
* https://www.townlong-yak.com/framexml/8.1.5/Blizzard_Deprecated/Deprecated_8_1_5.lua
==API==
====New====
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New C_CVar table
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New C_ClassColor table
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New C_ItemSocketInfo table
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New C_Texture table
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====Changes====
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====Removals====
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==Widgets==
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==Events==
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==CVars==
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