Update README.md to provide more installation guide and examples

Author: ritazh

README.md

@@ -2,30 +2,38 @@
 
 [![Build status](https://ci.appveyor.com/api/projects/status/ot69wbkyrcv7ig3p/branch/master?svg=true)](https://ci.appveyor.com/project/sedouard/windows-registry-node/branch/master)
 
-Read and Write to the Windows registry in-process from Node.js. Easily set application file associations and other goodies & such. You can also enable your application to run processes as an Administrator.
+Read and Write to the Windows registry in-process from Node.js. Easily set application file associations and launch processes as an Administrator.
 
 ## Install
 
-This library interacts with native Windows APIs. Ensure you have Visual Studio 2013 or newer build tools. Using Visual Studio is not 
-required. Then install the package:
+This library interacts with native Windows APIs. To add this module to your Node application, install the package:
 
 ```
 npm install windows-registry-node
+
 ```
 
+To install node modules that require compilation on Windows, make sure you have installed the [necessary build tools](https://github.com/nodejs/node-gyp#installation). Specifically, we need `npm install -g node-gyp`, a cross-platform cli written in Node.js for native addon modules for Node.js. 
+
+To install `node-gyp`, install [python v2.7.3](http://www.python.org/download/releases/2.7.3#download) and [Visual Studio 2013 build tools](http://www.microsoft.com/en-gb/download/details.aspx?id=44914). You do not need to install the full Visual Studio, only the build tools are required. Once the build tools are installed, you should be able to do `npm install -g node-gyp`. 
+
 ## Creating File Associations
 
-To create a file association, you can call the `fileAssociation.associateExeForFile` api which will make windows assign a default program for
-an arbitrary file extension:
+To create a file association, you can call the `fileAssociation.associateExeForFile` API, which will make windows assign a default program for an arbitrary file extension:
 
 ```js
 var utils = require('windows-registry').utils;
 utils.associateExeForFile('myTestHandler', 'A test handler for unit tests', 'C:\\path\\to\\icon', 'C:\\Program Files\\nodejs\\node.exe %1', '.zzz');
+
 ```
-## Reading / Writing to the Windows Registry
+After running the code above, you will see files with the extension of `.zzz` will be automatically associated with the Node program and their file icon will be changed to the Node file icon.
+
+!['GIF showing file association'](https://github.com/CatalystCode/windows-registry-node/blob/fix_readme/fileassoc.jpg)
+
+## Reading and Writing to the Windows Registry
 
 This library implements only a few of the basic registry commands, which allow you to do basic CRUD 
-operations for keys to the registry.
+operations for keys in the registry.
 
 ### Opening a Registry Key
 
@@ -34,6 +42,7 @@ Registry keys can be opened by either opening a predefined registry key defined
 ```js
 var Key = require('windows-registry').Key;
 var key = new Key(windef.HKEY.HKEY_CLASSES_ROOT, '.txt', windef.KEY_ACCESS.KEY_ALL_ACCESS);
+
 ```
 
 Or you can open a sub key from an already opened key:
@@ -42,12 +51,14 @@ Or you can open a sub key from an already opened key:
 var Key = require('windows-registry').Key;
 var key = new Key(windef.HKEY.HKEY_CLASSES_ROOT, '', windef.KEY_ACCESS.KEY_ALL_ACCESS);
 var key2 = key.openSubKey('.txt', windef.KEY_ACCESS.KEY_ALL_ACCESS);
+
 ```
 
-And don't forget to close your key when you're done, otherwise, you'll leak native resources:
+And don't forget to close your key when you're done. Otherwise, you will leak native resources:
 
 ```js
 key.close();
+
 ```
 
 ### Creating a Key
@@ -59,26 +70,28 @@ var Key = require('windows-registry').Key;
 // predefined key
 var key = new Key(windef.HKEY.HKEY_CLASSES_ROOT, '', windef.KEY_ACCESS.KEY_ALL_ACCESS);
 var createdKey = key.createSubKey('\test_key_name', windef.KEY_ACCESS.KEY_ALL_ACCESS);
-```
 
-### Delete a Key
+```
 
+### Deleting a Key
 To delete a key just call the `Key.deleteKey()` function.
 
 ```js
 createdKey.deleteKey();
+
 ```
 
-### Write a Value to a Key
+### Writing a Value to a Key
 
-To write a value, you'll again need a [Key](lib/key.js) object and just need to call the `Key.setValue` function:
+To write a value, you will again need a [Key](lib/key.js) object and just need to call the `Key.setValue` function:
 
 ```js
 var Key = require('windows-registry').Key,
 	windef = require('windows-registry').windef;
 
 var key = new Key(windef.HKEY.HKEY_CLASSES_ROOT, '.txt', windef.KEY_ACCESS.KEY_ALL_ACCESS);
 key.setValue('test_value_name', windef.REG_VALUE_TYPE.REG_SZ, 'test_value');
+
 ``` 
 
 ### Get a Value From a Key
@@ -91,14 +104,18 @@ var value = key.getValue('test_value_name');
 
 The return value depends on the type of the key (REG_SZ for example will give you a string).
 
-## Launching a Process as An Admin
+## Launching a Process as an Admin
 
-To launch a process as an Administrator, you can call the `uac.elevate` api, which will launch a process as an Administrator causing the UAC (User Account Control) elevation prompt to appear if required. This is similar to the Windows Explorer command "Run as administrator".  Pass in `FILEPATH` to the process you want to elevate. Pass in any`PARAMETERS` to run with the process. Since this is an asychronous call, pass in a callback to handle user's selection.
+To launch a process as an Administrator, you can call the `uac.elevate` API, which will launch a process as an Administrator causing the UAC (User Account Control) elevation prompt to appear if required. This is similar to the Windows Explorer command "Run as administrator".  Pass in `FILEPATH` to the process you want to elevate. Pass in any`PARAMETERS` to run with the process. Since this is an asynchronous call, pass in a callback to handle user's selection.
 
 ```js
-var uac = require('windows-registry').uac;
-uac.elevate('C:\\Program Files\\nodejs\\node.exe', 'index.js', function (err, result){console.log('callback');});
+var utils = require('windows-registry').utils;
+utils.elevate('C:\\Program Files\\nodejs\\node.exe', 'index.js', function (err, result){console.log(result);});
+
 ```
+The process you want to launch with admin access will only be launched after the callback is called and only if the user clicks Yes in the UAC prompt. Otherwise, the process will not be launched. If the user is already running as an admin, the UAC prompt will not be triggered and the process you provided will be launched as an administrator automatically.
+
+!['GIF showing launch process as an admin'](https://github.com/CatalystCode/windows-registry-node/blob/fix_readme/elevate.gif)
 
 ## More Docs?