Update README and bump to 1.2.1

Author: Matthew Tole

README.md

@@ -1,21 +1,23 @@
-# Utils
+# Utils [![npm (scoped)](https://img.shields.io/npm/v/@smallstoneapps/utils.svg?maxAge=2592000&style=flat-square)](https://www.npmjs.com/package/@smallstoneapps/utils) [![MIT License](http://img.shields.io/badge/license-MIT-lightgray.svg?style=flat-square)](./LICENSE)
 
 This is a small collection of [C macros][1] that make developing Pebble apps a little simpler.
 
-## Usage
+## Installation
 
-> **This feature is not yet available in the Pebble Tool.**
+*You must be using Pebble SDK 3.12 or newer to use this library.*
 
-You can use the new Pebble Tool to install the library from NPM.
+To install the package to your app, use the pebble tool:
 
 ```
-npm install --save @smallstoneapps/utils
+pebble package install @smallstoneapps/utils
 ```
 
+## Usage
+
 Include the header file in your source code.
 
 ```c
-#include "@smallstoneapps/utils/macros.h"
+#include <@smallstoneapps/utils/macros.h>
 ```
 
 ## Documentation

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@smallstoneapps/utils",
-  "version": "1.2.0",
+  "version": "1.2.1",
   "description": "A small collection of C macros that make developing Pebble apps a little simpler.",
   "main": "include/macros.h",
   "scripts": {