Update README.md

README.md

@@ -3,6 +3,13 @@ GraphQL Lua [![Join the chat at https://gitter.im/bjornbytes/graphql-lua](https:
 
 Lua implementation of GraphQL.
 
+Installation
+------------
+1. Using luvit  
+`lit install bjornbytes/graphql`
+2. Using luarocks  
+`luarocks install graphql`
+
 Example
 ---