refactor(readme): improve installation instructions

README.md

@@ -1,19 +1,23 @@
-This is a starter template for [Ionic](http://ionicframework.com/docs/) projects.
+This is a starter template for [Ionic](https://ionicframework.com/docs/) projects.
 
 ## How to use this template
 
-*This template does not work on its own*. The shared files for each starter are found in the [ionic2-app-base repo](https://github.com/driftyco/ionic2-app-base).
+*This template does not work on its own*. The shared files for each starter are found in the [ionic2-app-base repo](https://github.com/ionic-team/ionic2-app-base).
 
-To use this template, either create a new ionic project using the ionic node.js utility, or copy the files from this repository into the [Starter App Base](https://github.com/driftyco/ionic2-app-base).
+To use this template, either create a new ionic project using the ionic node.js utility, or copy the files from this repository into the [Starter App Base](https://github.com/ionic-team/ionic2-app-base).
 
 ### With the Ionic CLI:
 
 Take the name after `ionic2-starter-`, and that is the name of the template to be used when using the `ionic start` command below:
 
 ```bash
-$ sudo npm install -g ionic cordova
+$ npm install -g ionic cordova
 $ ionic start myTabs tabs
 ```
+:memo: *Note: For a global install of `-g ionic`, OSX/Linux users may need to prefix
+the command with `sudo` or can setup [proper file permissions on OSX for
+npm](https://www.johnpapa.net/how-to-use-npm-global-without-sudo-on-osx/) to
+install without `sudo`.*
 
 Then, to run it, cd into `myTabs` and run:
 
@@ -23,4 +27,3 @@ $ ionic cordova run ios
 ```
 
 Substitute ios for android if not on a Mac.
-