Clarify usage in README

Author: adammck

README.md

@@ -9,19 +9,20 @@ Terraform, then (re-)provision them with Ansible. It's pretty neat.
 
 Just download the OSX binary and run it.
 
-    curl -L -O https://github.com/adammck/terraform-inventory/releases/download/v0.2/terraform-inventory
-    chmod u+x terraform-inventory
-    ./terraform-inventory --list whatever.tfstate
+	curl -L -O https://github.com/adammck/terraform-inventory/releases/download/v0.2/terraform-inventory
+	chmod u+x terraform-inventory
+	./terraform-inventory --list whatever.tfstate
 
-Ansible doesn't (seem to) support calling the inventory script with parameters,
-so I like to wrap this tool up in a little shell script, and call that.
-Something like:
+Ansible doesn't (seem to) support calling the inventory script with parameters
+(and this tool doesn't support configuration via environment variables yet), so
+I like to create a little shell script and call that. Something like:
 
 	#!/bin/bash
-	terraform-inventory $@ $(dirname $0)/deploy/terraform.tfstate
+	terraform-inventory $@ deploy/terraform.tfstate
 
-Configuration via environment variables, like most other dynamic inventory
-scripts, is coming soon.
+Then run Ansible with the script as an inventory:
+
+	ansible-playbook --inventory-file=bin/inventory deploy/playbook.yml
 
 
 ## Development