Config rework

.gitignore

@@ -0,0 +1,3 @@
+bin/*
+terraform-provider-fleet
+

README.md

@@ -12,11 +12,78 @@ A plugin for Terraform enabling it to manipulate
 
 ## Usage
 
+This terraform plugin supports the same connections as fleetctl. The
+configuration mimics the fleetctl tool as well.
+
+Here are the configuration names, default values, descriptions, and required
+values from the terraform provider schema:
+
+- driver
+  * Description: Adapter used to execute fleetctl commands. Options include api and etcd.
+  * Default: "api"
+- endpoint
+  * Description: Location of the fleet API if --driver=api. Alternatively, if --driver=etcd, location of the etcd API.
+  * Default: "unix:///var/run/fleet.sock"
+- etcd-key-prefix
+  * Description: Keyspace for fleet data in etcd (development use only!)
+- key-file
+  * Default: /var/run/fleet.sock
+  * Description: Location of TLS key file used to secure communication with the fleet API or etcd
+- cert-file
+  * Description: Location of TLS cert file used to secure communication with the fleet API or etcd
+  * Default:
+- ca-file
+  * Description: Location of TLS CA file used to secure communication with the fleet API or etcd
+  * Default:
+- tunnel
+  * Description: Establish an SSH tunnel through the provided address for communication with fleet and etcd.
+  * Default:
+- known-hosts-file
+  * Description: File used to store remote machine fingerprints. Ignored if strict host key checking is disabled.
+  * Default: ssh.DefaultKnownHostsFile
+- ssh-username
+  * Description: Username to use when connecting to CoreOS instance.
+  * Default: "core"
+- strict-host-key-checking
+  * Description: Verify host keys presented by remote machines before initiating SSH connections.
+  * Default: true
+- ssh-timeout
+  * Description: Amount of time in seconds to allow for SSH connection initialization before failing.
+  * Default: 10.0
+- request-timeout
+  * Description: Amount of time in seconds to allow a single request before considering it failed.
+  * Default: 3.0
+
+EX:
+
+```
+provider "fleet" {
+  driver = "etcd"
+  endpoint = "http://192.168.0.1:4001"
+  // etcd_key_prefix can be ommited to use the default value
+  etcd_key_prefix = "/_some/_weird/etcd/prefix"
+}
+```
+
+```
+provider "fleet" {
+  driver = "api"
+  endpoint = "http://192.168.0.1:8080"
+}
+```
+
+```
+provider "fleet" {
+  tunnel = "10.0.0.1:22"
+  ssh_username = "not_core"
+}
+```
+
 There is only one resource: `fleet_unit`. Here is the first example from
 [the Fleet introduction][3], transcribed to Terraform:
 
     provider "fleet" {
-        tunnel_address = "IP_OR_HOSTNAME_OF_A_COREOS_HOST"
+        endpoint = "IP_OR_HOSTNAME_OF_A_COREOS_HOST"
     }
 
     resource "fleet_unit" "myapp" {