Fixed AppVeyor build cache [skip ci]

Loading screen is now in XML, finally!

Removed dxApplicationRender and cleaned up CApplication
Moved rs_loadingstages from xrRender to xrEngine

Fixed xrRender_GL compilation after glslang removal

Sorry.

xrRender_R1: Added MT details and HOM processing from R2

+5 FPS when enabled

Move render stats to render thread

Refactor ECO_RENDER

xrCore/xrDebug.cpp: GetInstructionPtr() refactor

Fixed BugTrap reports path

Fix memory leak at exit in xrEngine.

Fix xrLC compilation

Replace DEFINE_* macro with inplace type alias (Part 3)

Thank to Im-Dex.
From commit:
Im-dex/xray-162@9107297