Add build and install instructions

Author: jcansdale

README.md

@@ -26,7 +26,7 @@ Beta releases will have `(beta)` in their title in the gallery, following the ve
 
 Clone the repository and its submodules in a git GUI client or via the command line:
 
-```
+```txt
 git clone https://github.com/github/VisualStudio
 cd VisualStudio
 git submodule init
@@ -40,6 +40,20 @@ To be able to use the GitHub API, you'll need to:
 - [Register a new developer application](https://github.com/settings/developers) in your profile.
 - Open [src/GitHub.App/Api/ApiClientConfiguration.cs](src/GitHub.App/Api/ApiClientConfiguration.cs) and fill out the clientId/clientSecret fields for your application.
 
+Build using Visual Studio 2015 or:
+
+```txt
+build.cmd
+```
+
+Install in live (non-Exp) instances of Visual Studio 2015 and 2017:
+
+```txt
+install.cmd
+```
+
+Note, the script will only install in one instance of Visual Studio 2017 (Enterprise, Professional of Community).
+
 ## More information
 
 - Andreia Gaita's [presentation](https://www.youtube.com/watch?v=hz2hCO8e_8w) at Codemania 2016 about this extension.