Moving extensions and API versions into different sub-packages; fixing test helper methods
diff --git a/openstack/networking/v2/extensions/doc.go b/openstack/networking/v2/extensions/doc.go
new file mode 100644
index 0000000..83c4a6a
--- /dev/null
+++ b/openstack/networking/v2/extensions/doc.go
@@ -0,0 +1 @@
+package networks
diff --git a/openstack/networking/v2/extensions/errors.go b/openstack/networking/v2/extensions/errors.go
new file mode 100644
index 0000000..83c4a6a
--- /dev/null
+++ b/openstack/networking/v2/extensions/errors.go
@@ -0,0 +1 @@
+package networks
diff --git a/openstack/networking/v2/extensions/requests.go b/openstack/networking/v2/extensions/requests.go
new file mode 100644
index 0000000..b406c51
--- /dev/null
+++ b/openstack/networking/v2/extensions/requests.go
@@ -0,0 +1,22 @@
+package networks
+
+import (
+	"github.com/racker/perigee"
+	"github.com/rackspace/gophercloud"
+)
+
+func Get(c *gophercloud.ServiceClient, name string) (*Extension, error) {
+	var ext Extension
+	_, err := perigee.Request("GET", ExtensionURL(c, name), perigee.Options{
+		MoreHeaders: c.Provider.AuthenticatedHeaders(),
+		Results: &struct {
+			Extension *Extension `json:"extension"`
+		}{&ext},
+		OkCodes: []int{200},
+	})
+
+	if err != nil {
+		return nil, err
+	}
+	return &ext, nil
+}
diff --git a/openstack/networking/v2/extensions/requests_test.go b/openstack/networking/v2/extensions/requests_test.go
new file mode 100644
index 0000000..5ae7ec6
--- /dev/null
+++ b/openstack/networking/v2/extensions/requests_test.go
@@ -0,0 +1,60 @@
+package networks
+
+import (
+	"fmt"
+	"net/http"
+	"testing"
+
+	"github.com/rackspace/gophercloud"
+	th "github.com/rackspace/gophercloud/testhelper"
+)
+
+const TokenID = "123"
+
+func ServiceClient() *gophercloud.ServiceClient {
+	return &gophercloud.ServiceClient{
+		Provider: &gophercloud.ProviderClient{
+			TokenID: TokenID,
+		},
+		Endpoint: th.Endpoint(),
+	}
+}
+
+func TestList(t *testing.T) {
+
+}
+
+func TestGet(t *testing.T) {
+	th.SetupHTTP()
+	defer th.TeardownHTTP()
+
+	th.Mux.HandleFunc("/v2.0/extension/agent", func(w http.ResponseWriter, r *http.Request) {
+		th.TestMethod(t, r, "GET")
+		th.TestHeader(t, r, "X-Auth-Token", TokenID)
+
+		w.Header().Add("Content-Type", "application/json")
+		w.WriteHeader(http.StatusOK)
+
+		fmt.Fprintf(w, `
+{
+    "extension": {
+        "updated": "2013-02-03T10:00:00-00:00",
+        "name": "agent",
+        "links": [],
+        "namespace": "http://docs.openstack.org/ext/agent/api/v2.0",
+        "alias": "agent",
+        "description": "The agent management extension."
+    }
+}
+		`)
+
+		ext, err := Get(ServiceClient(), "agent")
+		th.AssertNoErr(t, err)
+
+		th.AssertEquals(t, ext.Updated, "2013-02-03T10:00:00-00:00")
+		th.AssertEquals(t, ext.Name, "agent")
+		th.AssertEquals(t, ext.Namespace, "http://docs.openstack.org/ext/agent/api/v2.0")
+		th.AssertEquals(t, ext.Alias, "agent")
+		th.AssertEquals(t, ext.Description, "The agent management extension.")
+	})
+}
diff --git a/openstack/networking/v2/extensions/results.go b/openstack/networking/v2/extensions/results.go
new file mode 100644
index 0000000..3b21644
--- /dev/null
+++ b/openstack/networking/v2/extensions/results.go
@@ -0,0 +1,10 @@
+package networks
+
+type Extension struct {
+	Updated     string        `json:"updated"`
+	Name        string        `json:"name"`
+	Links       []interface{} `json:"links"`
+	Namespace   string        `json:"namespace"`
+	Alias       string        `json:"alias"`
+	Description string        `json:"description"`
+}
diff --git a/openstack/networking/v2/extensions/urls.go b/openstack/networking/v2/extensions/urls.go
new file mode 100644
index 0000000..d70dd9b
--- /dev/null
+++ b/openstack/networking/v2/extensions/urls.go
@@ -0,0 +1,9 @@
+package networks
+
+import "github.com/rackspace/gophercloud"
+
+const Version = "v2.0"
+
+func ExtensionURL(c *gophercloud.ServiceClient, name string) string {
+	return c.ServiceURL(Version, "extensions", name)
+}
diff --git a/openstack/networking/v2/extensions/urls_test.go b/openstack/networking/v2/extensions/urls_test.go
new file mode 100644
index 0000000..af01cb9
--- /dev/null
+++ b/openstack/networking/v2/extensions/urls_test.go
@@ -0,0 +1,20 @@
+package networks
+
+import (
+	"testing"
+
+	"github.com/rackspace/gophercloud"
+	th "github.com/rackspace/gophercloud/testhelper"
+)
+
+const Endpoint = "http://localhost:57909/"
+
+func EndpointClient() *gophercloud.ServiceClient {
+	return &gophercloud.ServiceClient{Endpoint: Endpoint}
+}
+
+func TestExtensionURL(t *testing.T) {
+	actual := ExtensionURL(EndpointClient(), "agent")
+	expected := Endpoint + "v2.0/extensions/agent"
+	th.AssertEquals(t, expected, actual)
+}