Updated terraform output

website/source/intro/getting-started/install.html.markdown

@@ -42,13 +42,21 @@ terminal session and checking that `terraform` is available. By executing
 
 ```
 $ terraform
-usage: terraform [--version] [--help] <command> [<args>]
+Usage: terraform [--version] [--help] <command> [args]
 
-Available commands are:
+The available commands for execution are listed below.
+The most common, useful commands are shown first, followed by
+less common or more advanced commands. If you're just getting
+started with Terraform, stick with the common commands. For the
+other commands, please read the help and docs before usage.
+
+Common commands:
     apply              Builds or changes infrastructure
     destroy            Destroy Terraform-managed infrastructure
+    fmt                Rewrites config files to canonical format
     get                Download and install modules for the configuration
     graph              Create a visual graph of Terraform resources
+    import             Import existing infrastructure into Terraform
     init               Initializes Terraform configuration from a module
     output             Read an output from a state file
     plan               Generate and show an execution plan
@@ -57,8 +65,12 @@ Available commands are:
     remote             Configure remote state storage
     show               Inspect Terraform state or plan
     taint              Manually mark a resource for recreation
+    untaint            Manually unmark a resource as tainted
     validate           Validates the Terraform files
     version            Prints the Terraform version
+
+All other commands:
+    state              Advanced state management
 ```
 
 If you get an error that `terraform` could not be found, then your PATH