Update index.md
Update index.md

Grammer fixes, added to Syslinux explanation.
jp2masa/Cosmos,MetSystem/Cosmos,zhangwenquan/Cosmos,zdimension/Cosmos,MyvarHD/Cosmos,MetSystem/Cosmos,zhangwenquan/Cosmos,tgiphil/Cosmos,jp2masa/Cosmos,Cyber4/Cosmos,zhangwenquan/Cosmos,fanoI/Cosmos,jp2masa/Cosmos,sgetaz/Cosmos,sgetaz/Cosmos,trivalik/Cosmos,zarlo/Cosmos,zdimension/Cosmos,CosmosOS/Cosmos,tgiphil/Cosmos,zhangwenquan/Cosmos,sgetaz/Cosmos,sgetaz/Cosmos,zarlo/Cosmos,tgiphil/Cosmos,MetSystem/Cosmos,MetSystem/Cosmos,Cyber4/Cosmos,zarlo/Cosmos,MyvarHD/Cosmos,zhangwenquan/Cosmos,MetSystem/Cosmos,trivalik/Cosmos,MyvarHD/Cosmos,fanoI/Cosmos,zdimension/Cosmos,MyvarHD/Cosmos,trivalik/Cosmos,MyvarHD/Cosmos,sgetaz/Cosmos,Cyber4/Cosmos,CosmosOS/Cosmos,zarlo/Cosmos,zdimension/Cosmos,Cyber4/Cosmos,CosmosOS/Cosmos,CosmosOS/Cosmos,Cyber4/Cosmos,fanoI/Cosmos,zdimension/Cosmos