AssemblyScript now expose full compiler api. See commits [#1](https://github.com/AssemblyScript/assemblyscript/commit/6ed45bee98e8b644b87d50b40983414351f62311) and [#2](https://github.com/AssemblyScript/assemblyscript/commit/aedc821c099104919500d7f36425616b9a85606e). So fork of AS is not necessary I guess for now cc @lrettig
