Merge pull request #3982 from nameson2672/nameson2672-patch-1

install command from cli is added in README.md

Author: jbogard

README.md

@@ -48,6 +48,10 @@ First, [install NuGet](http://docs.nuget.org/docs/start-here/installing-nuget).
 ```
 PM> Install-Package AutoMapper
 ```
+Or from the .NET CLI as:
+```
+dotnet add package AutoMapper
+```
 
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