Release 1.15.8

Changelog

# Cemu detailed changelog for 1.15.8
# Patreon release date: 2019-05-31
# Public release date:  2019-06-07

general: Updated language files

overlay: Added an option to scale the text size
overlay: Moved some options into a separate notification overlay
         Also added new notification options:
            - The amount of shaders compiled while playing (#40)
            - Friend list information (friend requests, online/offline notifications) (#72)

debug: Added debug option to dump nlibcurl HTTP/HTTPS requests

GX2: Improved accuracy of streamout cache
     This addresses the following known issues:
     BotW - Particles drifting/warping to wrong positions
     Tekken Tag 2 - Corrupted colors/textures on character models
     
GX2: Resolved an issue where GX2SurfaceCopy() calculated the wrong destination mip level for GPU-side copies
     This fixes corrupted textures in:
     Lost Reavers, Devil's Third, Ninja Gaiden and Transformers RotDS

nlibcurl: Fixed a potential crash in curl init methods
nlibcurl: Improved accuracy and behavior of read callbacks
          This fixes a crash when uploading levels in Super Mario Maker (#68)

coreinit: Implemented OSConsoleWrite(). Any console output will be printed to log.txt

vpad: Fixed VPADControlMotor using the wrong pattern length (#60)
vpad: Fixed a rare crash caused by rumble

Note:
(#xx) refers to bug tracker issues fixed by this change. See http://bugs.cemu.info/projects/cemu/