Merge pull request #734 from Alcaro/master

Add memory descriptor interface to libretro.h, for use with cheats.
(Lakka) Style nits
Create public init_menu/uninit_menu
(Lakka) More cleanups
(Lakka) Goes over subitems now too to remove GL textures
(Lakka) Cleanups
Revert "Create public init_menu/uninit_menu"

This reverts commit 8f7e9edd8819fdc1281a069fa06aadaa772b30e3.
(Lakka) Cleanups
(PSP) add icon/background to EBOOT.PBP
(PSP) update dist-script
Merge pull request #735 from aliaspider/master

(PSP) add icon/background to launcher / update dist-script
(Lakka) Cleanups
(Lakka) Put gluint textures into array
(Lakka) Further refactorings - turn textures into struct array
Style nits in libretro.h.
(Lakka) New icons
Merge pull request #736 from lakkatv/lakka

(Lakka) New icons
Remove frontend_salamander.h
Cleanup frontend/frontend_salamander.c
Cleanup frontend_salamander.c