Update README to include grunt-cli step.

README.md

@@ -45,29 +45,31 @@ First, clone a copy of the main jQuery git repo by running:
 git clone git://github.com/jquery/jquery.git
 ```
 
-Enter the directory and install the Node dependencies:
+Install the grunt-cli package so that you will have the correct version of grunt available from any project that needs it. This should be done as a global install:
 
 ```bash
-cd jquery && npm install
+npm install -g grunt-cli
 ```
 
+Enter the jquery directory and install the Node dependencies, this time *without* specifying a global install:
+
+```bash
+cd jquery && npm install
+```
 
 Make sure you have `grunt` installed by testing:
 
 ```bash
 grunt -version
 ```
 
-
-
 Then, to get a complete, minified (w/ Uglify.js), linted (w/ JSHint) version of jQuery, type the following:
 
 ```bash
 grunt
 ```
 
-
-The built version of jQuery will be put in the `dist/` subdirectory.
+The built version of jQuery will be put in the `dist/` subdirectory, along with the minified copy and associated map file.
 
 
 ### Modules (new in 1.8)
@@ -165,7 +167,7 @@ Run the unit tests with a local server that supports PHP. No database is require
 Building to a different directory
 ---------------------------------
 
-If you want to build jQuery to a directory that is different from the default location:
+To copy the built jQuery files from `/dist` to another directory:
 
 ```bash
 grunt && grunt dist:/path/to/special/location/
@@ -177,7 +179,7 @@ With this example, the output files would be:
 /path/to/special/location/jquery.min.js
 ```
 
-If you want to add a permanent copy destination, create a file in `dist/` called ".destination.json". Inside the file, paste and customize the following:
+To add a permanent copy destination, create a file in `dist/` called ".destination.json". Inside the file, paste and customize the following:
 
 ```json
 
@@ -186,7 +188,6 @@ If you want to add a permanent copy destination, create a file in `dist/` called
 }
 ```
 
-
 Additionally, both methods can be combined.
 
 
@@ -204,8 +205,8 @@ Note: This task will also be run any time the default `grunt` command is used.
 
 
 
-Git for dummies
----------------
+Essential Git
+-------------
 
 As the source code is handled by the version control system Git, it's useful to know some features used.