Release 1.15.6b

# Cemu detailed changelog for 1.15.6b
# Patreon release date: 2019-05-03
# Public release date:  2019-05-10

# New in 1.15.6b:

general: Restored compatibility with cemuhook custom timers
general: Fixed broken bicubic and hermite upscaling/downscaling filter

CPU/JIT: Always correctly emulate single-precision operations (fixes softlocks and gameplay bugs)

# New in 1.15.6:

general: Reworked UI and removed deprecated options
         Experimental menu is gone and RDTSC is now always on
         Removed support for conventional shaders (always use separable shaders)
         CPU timer mode is now always 'host based'

general: Added UI to configure game profiles (accessible via right click on an entry in game list) 
         Includes option to set controller profiles (#17)

general: Added tooltips for some of the settings

nsyshid: Implemented HIDWrite()
nsyshid: Use packet maximum size provided by device instead of a fixed value
nsyshid: Accuracy tweaks in HIDRead()
         These changes should improve support and increase stability for Skylanders and Lego USB portals

coreinit: More tweaks to MEM2 heap size to fix Lego games (#48)

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