updated: compiler specs

Author: GianlucaGuarini

README.md

@@ -84,6 +84,20 @@ riot.define('my-tag', {
 
 Check for example [this demo](https://jsfiddle.net/gianlucaguarini/ed31q3qk/) to see how it's going to work
 
+## New specs
+
+- All the code in the `<script>` tag will be left untouched without adding any extra riot magic
+- The tag templates must be wrapped into a `<template>` tag
+- The relation `riot tag => file.tag` will be 1 to 1 so it will be not possible to define multiple tags in the same file
+- It will be not possible to define multiple `<script><template><style>` tags in the same file
+
+## New feature
+
+- The new compiler is per default async so it will always return a promise
+- The source code will be simplified a lot avoiding to maintain different forks for the browser/node versions
+- It will generate always sourcemaps
+- It will be simpler to validate the riot tags syntax due to a cleaner and unambigous structure
+
 [travis-image]:  https://img.shields.io/travis/riot/compiler.svg?style=flat-square
 [travis-url]:    https://travis-ci.org/riot/compiler
 [license-image]: https://img.shields.io/badge/license-MIT-000000.svg?style=flat-square