Adding short echo tag special syntax documentation.
Adding short echo tag special syntax documentation.

muyehub/lithium,m4rcsch/lithium-core-library,SensCritique/lithium,datachand/lithium,pixelcog/lithium,muyehub/lithium,m4rcsch/li3_framework,davidpersson/lithium,jails/lithium,wbeater/lithium,mehlah/lithium,whowgames/lithium,mehlah/lithium,qoqa/lithium,wbeater/lithium,datachand/lithium,davidpersson/lithium,graphis/lithium,whowgames/lithium,UnionOfRAD/lithium,UnionOfRAD/framework,graphis/lithium,pixelcog/lithium,qoqa/lithium,SensCritique/lithium,jails/lithium,UnionOfRAD/lithium,m4rcsch/lithium-core-library