Add Graphiti section to README

Author: paulofaria

.swift-version

@@ -1 +1 @@
-3.0.1
+3.0-RELEASE

README.md

@@ -1,4 +1,4 @@
-# [![Logo](Images/logo.png)](https://github.com/GraphQLSwift/GraphQL) GraphQL 
+# GraphQL 
 
 The Swift implementation for GraphQL, a query language for APIs created by Facebook.
 
@@ -11,6 +11,12 @@ The Swift implementation for GraphQL, a query language for APIs created by Faceb
 
 Looking for help? Find resources [from the community](http://graphql.org/community/).
 
+## Graphiti
+
+This repo contains the core GraphQL implementation. For a better experience when creating your types use [Graphiti](https://github.com/GraphQLSwift/Graphiti).
+
+**Graphiti** is a Swift library for building GraphQL schemas/types fast, safely and easily.
+
 
 ## Getting Started