Add CubemapLoader as one of the defaults (#4847)
Add CubemapLoader as one of the defaults (#4847)


bladecoder/libgdx,MikkelTAndersen/libgdx,josephknight/libgdx,cypherdare/libgdx,MovingBlocks/libgdx,MovingBlocks/libgdx,josephknight/libgdx,ttencate/libgdx,sarkanyi/libgdx,Zomby2D/libgdx,josephknight/libgdx,Zomby2D/libgdx,alex-dorokhov/libgdx,FredGithub/libgdx,NathanSweet/libgdx,tommyettinger/libgdx,stinsonga/libgdx,MikkelTAndersen/libgdx,MovingBlocks/libgdx,NathanSweet/libgdx,MikkelTAndersen/libgdx,NathanSweet/libgdx,sarkanyi/libgdx,tommyettinger/libgdx,josephknight/libgdx,ttencate/libgdx,libgdx/libgdx,stinsonga/libgdx,ttencate/libgdx,FredGithub/libgdx,tommyettinger/libgdx,alex-dorokhov/libgdx,FredGithub/libgdx,sarkanyi/libgdx,FredGithub/libgdx,FredGithub/libgdx,NathanSweet/libgdx,cypherdare/libgdx,ttencate/libgdx,MovingBlocks/libgdx,josephknight/libgdx,libgdx/libgdx,sarkanyi/libgdx,cypherdare/libgdx,josephknight/libgdx,alex-dorokhov/libgdx,tommyettinger/libgdx,MikkelTAndersen/libgdx,alex-dorokhov/libgdx,ttencate/libgdx,stinsonga/libgdx,bladecoder/libgdx,libgdx/libgdx,MovingBlocks/libgdx,bladecoder/libgdx,FredGithub/libgdx,MovingBlocks/libgdx,ttencate/libgdx,FredGithub/libgdx,Zomby2D/libgdx,MovingBlocks/libgdx,MovingBlocks/libgdx,josephknight/libgdx,stinsonga/libgdx,josephknight/libgdx,sarkanyi/libgdx,libgdx/libgdx,bladecoder/libgdx,NathanSweet/libgdx,MikkelTAndersen/libgdx,libgdx/libgdx,alex-dorokhov/libgdx,cypherdare/libgdx,Zomby2D/libgdx,sarkanyi/libgdx,stinsonga/libgdx,ttencate/libgdx,sarkanyi/libgdx,cypherdare/libgdx,FredGithub/libgdx,MikkelTAndersen/libgdx,tommyettinger/libgdx,alex-dorokhov/libgdx,alex-dorokhov/libgdx,ttencate/libgdx,bladecoder/libgdx,alex-dorokhov/libgdx,Zomby2D/libgdx,MikkelTAndersen/libgdx,MikkelTAndersen/libgdx,sarkanyi/libgdx