Updating README.md to remove Twinkle (#1369)
Updating README.md to remove Twinkle (#1369)

Twinkle's url no longer works, so removing it.
LWJGL-CI/bgfx,bkaradzic/bgfx,jdryg/bgfx,mendsley/bgfx,MikePopoloski/bgfx,jdryg/bgfx,attilaz/bgfx,MikePopoloski/bgfx,bkaradzic/bgfx,LWJGL-CI/bgfx,mendsley/bgfx,fluffyfreak/bgfx,septag/bgfx,mendsley/bgfx,LWJGL-CI/bgfx,jpcy/bgfx,jpcy/bgfx,emoon/bgfx,fluffyfreak/bgfx,jpcy/bgfx,bkaradzic/bgfx,fluffyfreak/bgfx,jdryg/bgfx,bkaradzic/bgfx,MikePopoloski/bgfx,jpcy/bgfx,jdryg/bgfx,attilaz/bgfx,attilaz/bgfx,septag/bgfx,LWJGL-CI/bgfx,fluffyfreak/bgfx,emoon/bgfx,septag/bgfx,emoon/bgfx