Document the CLI’s install and uninstall commands

Closes gh-1506

spring-boot-docs/src/main/asciidoc/spring-boot-cli.adoc

@@ -95,6 +95,40 @@ Here is an example ``hello world'' web application written in Groovy:
 
 
 
+[[cli-install-uninstall]]
+=== Adding dependencies to the CLI
+You can add dependencies to the CLI using the `install` command. The command takes one
+or more sets of artifact coordinates in the format `group:artifact:version`. For example:
+
+[indent=0,subs="verbatim,quotes,attributes"]
+----
+	$ spring install com.example:spring-boot-cli-extension:1.0.0.RELEASE
+----
+
+In addition to installing the artifacts identified by the coordinates you supply, all of
+the artifacts' dependencies will also be installed.
+
+To uninstall a dependency use the `uninstall` command. As with the `install` command, it
+takes one or more sets of artifact coordinates in the format `group:artifact:version`.
+For example:
+
+[indent=0,subs="verbatim,quotes,attributes"]
+----
+	$ spring uninstall com.example:spring-boot-cli-extension:1.0.0.RELEASE
+----
+
+It will uninstall the artifacts identified by the coordinates you supply and their
+dependencies.
+
+To uninstall all additional dependencies you can use the `--all` option. For example:
+
+[indent=0,subs="verbatim,quotes,attributes"]
+----
+	$ spring uninstall --all
+----
+
+
+
 [[cli-deduced-grab-annotations]]
 ==== Deduced ``grab'' dependencies
 Standard Groovy includes a `@Grab` annotation which allows you to declare dependencies