Update README with Package Control name

Author: billti

README.md

@@ -7,7 +7,7 @@ an enhanced Sublime Text experience when working with TypeScript code.
 Installation
 ------------
 If using [Package Control](https://packagecontrol.io/) for Sublime Text, simply 
-install the `TODO` package.  
+install the `TypeScriptLang` package.  
 
 Alternatively, you can clone the repo directly into
 your Sublime plugin folder.  For example, for Sublime Text 3 on a Mac this would