Update README.md

Amended based on code review feedback

Author: wwwlicious

README.md

@@ -22,12 +22,14 @@ for information about known differences which you may notice when switching to S
 
 ## Installation
 
-StyleCopAnalyzers can be installed using the NuGet Package Manager in Visual Studio 2015.
+StyleCopAnalyzers can be installed using the NuGet command line or the NuGet Package Manager in Visual Studio 2015.
 
+**Install using the command line:**
 ```bash
 Install-Package StyleCop.Analyzers
 ```
 
+**Install using the package manager:**
 ![Install via nuget](https://cloud.githubusercontent.com/assets/1408396/8233513/491f301a-159c-11e5-8b7a-1e16a0695da6.png)
 
 ## Team Considerations