udpate readme with development setup

yyx990803 · yyx990803 · commit cda033d8a4fd · 2017-12-15T10:39:18.000-05:00
diff --git a/README.md b/README.md
@@ -9,11 +9,23 @@ Sublime Text Syntax highlighting for single-file [Vue.js](http://vuejs.org) comp
 - Via Package Control: search for `Vue Syntax Highlight`.
 - Manual: clone this repo into your Sublime `Packages` folder.
 
-**NOTE:** You still need to install corresponding packages for pre-processors (e.g. Jade, SASS, CoffeeScript) to get proper syntax highlighting for them.
+**NOTE:** You still need to install corresponding packages for pre-processors (e.g. Pug, SASS, CoffeeScript) to get proper syntax highlighting for them.
 
 ### Enabling JSX Highlighting
 
-The `<script>` block uses the syntax highlighting currently active for you normal `.js` files. To support JSX highlighting inside Vue files, just set [Babel javascript highlighting package](https://packagecontrol.io/packages/Babel), which supports JSX, as your default JS highlighting. **Note you may need to explicitly disable Sublime's default `JavaScript` package to make it work.**
+The `<script>` block uses the syntax highlighting currently active for you normal `.js` files. To support JSX highlighting inside Vue files:
+
+1. Install and set [Babel javascript highlighting package](https://packagecontrol.io/packages/Babel), which supports JSX, as your default JS highlighting.
+
+2. Explicitly disable Sublime's default `JavaScript` package. This allows the Babel package to be applied the embedded `<script>` in `*.vue` files. You may need to restart Sublime for this to take effect.
+
+### Development
+
+> Note: the `master` branch hosts the new syntax that only works in Sublime build > 3153. For the old syntax, see `oldsyntax` branch.
+
+- The development of this syntax relies on the [YAML-Macros](https://github.com/Thom1729/YAML-Macros) package. You can install it from Package Control.
+
+- Do not edit `Vue Component.sublime-syntax` directly. Work in `Vue Component.sublime-syntax.yaml-macros` instead. Once done editing, run "Build With: YAML Macros" from Sublime's command palette. This will update the actual `Vue Component.sublime-syntax` file.
 
 ### License
 
