Identity v3 Projects Create (#165)

* Identity v3 Projects Create

* Removing unused createErr function
diff --git a/openstack/identity/v3/projects/requests.go b/openstack/identity/v3/projects/requests.go
index 73e4c4c..07b9371 100644
--- a/openstack/identity/v3/projects/requests.go
+++ b/openstack/identity/v3/projects/requests.go
@@ -83,3 +83,46 @@
 	})
 	return
 }
+
+// CreateOptsBuilder allows extensions to add additional parameters to
+// the Create request.
+type CreateOptsBuilder interface {
+	ToProjectCreateMap() (map[string]interface{}, error)
+}
+
+// CreateOpts allows you to modify the details included in the Create request.
+type CreateOpts struct {
+	// DomainID is the ID this project will belong under.
+	DomainID string `json:"domain_id,omitempty"`
+
+	// Enabled sets the project status to enabled or disabled.
+	Enabled *bool `json:"enabled,omitempty"`
+
+	// IsDomain indicates if this project is a domain.
+	IsDomain *bool `json:"is_domain,omitempty"`
+
+	// Name is the name of the project.
+	Name string `json:"name,required"`
+
+	// ParentID specifies the parent project of this new project.
+	ParentID string `json:"parent_id,omitempty"`
+
+	// Description is the description of the project.
+	Description string `json:"description,omitempty"`
+}
+
+// ToProjectCreateMap formats a CreateOpts into a create request.
+func (opts CreateOpts) ToProjectCreateMap() (map[string]interface{}, error) {
+	return gophercloud.BuildRequestBody(opts, "project")
+}
+
+// Create creates a new Project.
+func Create(client *gophercloud.ServiceClient, opts CreateOptsBuilder) (r CreateResult) {
+	b, err := opts.ToProjectCreateMap()
+	if err != nil {
+		r.Err = err
+		return
+	}
+	_, r.Err = client.Post(createURL(client), &b, &r.Body, nil)
+	return
+}
diff --git a/openstack/identity/v3/projects/results.go b/openstack/identity/v3/projects/results.go
index 2ec05a8..c828ff8 100644
--- a/openstack/identity/v3/projects/results.go
+++ b/openstack/identity/v3/projects/results.go
@@ -14,6 +14,11 @@
 	projectResult
 }
 
+// CreateResult temporarily contains the reponse from the Create call.
+type CreateResult struct {
+	projectResult
+}
+
 // Project is a base unit of ownership.
 type Project struct {
 	// IsDomain indicates whether the project is a domain.
diff --git a/openstack/identity/v3/projects/testing/fixtures.go b/openstack/identity/v3/projects/testing/fixtures.go
index cb10313..0c839b8 100644
--- a/openstack/identity/v3/projects/testing/fixtures.go
+++ b/openstack/identity/v3/projects/testing/fixtures.go
@@ -55,6 +55,16 @@
 }
 `
 
+// CreateRequest provides the input to a Create request.
+const CreateRequest = `
+{
+  "project": {
+		"description": "The team that is red",
+		"name": "Red Team"
+  }
+}
+`
+
 // RedTeam is a Project fixture.
 var RedTeam = projects.Project{
 	IsDomain:    false,
@@ -107,3 +117,16 @@
 		fmt.Fprintf(w, GetOutput)
 	})
 }
+
+// HandleCreateProjectSuccessfully creates an HTTP handler at `/projects` on the
+// test handler mux that tests project creation.
+func HandleCreateProjectSuccessfully(t *testing.T) {
+	th.Mux.HandleFunc("/projects", func(w http.ResponseWriter, r *http.Request) {
+		th.TestMethod(t, r, "POST")
+		th.TestHeader(t, r, "X-Auth-Token", client.TokenID)
+		th.TestJSONRequest(t, r, CreateRequest)
+
+		w.WriteHeader(http.StatusCreated)
+		fmt.Fprintf(w, GetOutput)
+	})
+}
diff --git a/openstack/identity/v3/projects/testing/requests_test.go b/openstack/identity/v3/projects/testing/requests_test.go
index eeb2049..daed4eb 100644
--- a/openstack/identity/v3/projects/testing/requests_test.go
+++ b/openstack/identity/v3/projects/testing/requests_test.go
@@ -38,3 +38,18 @@
 	th.AssertNoErr(t, err)
 	th.CheckDeepEquals(t, RedTeam, *actual)
 }
+
+func TestCreateProject(t *testing.T) {
+	th.SetupHTTP()
+	defer th.TeardownHTTP()
+	HandleCreateProjectSuccessfully(t)
+
+	createOpts := projects.CreateOpts{
+		Name:        "Red Team",
+		Description: "The team that is red",
+	}
+
+	actual, err := projects.Create(client.ServiceClient(), createOpts).Extract()
+	th.AssertNoErr(t, err)
+	th.CheckDeepEquals(t, RedTeam, *actual)
+}
diff --git a/openstack/identity/v3/projects/urls.go b/openstack/identity/v3/projects/urls.go
index 5effbfb..7be9dc2 100644
--- a/openstack/identity/v3/projects/urls.go
+++ b/openstack/identity/v3/projects/urls.go
@@ -9,3 +9,7 @@
 func getURL(client *gophercloud.ServiceClient, projectID string) string {
 	return client.ServiceURL("projects", projectID)
 }
+
+func createURL(client *gophercloud.ServiceClient) string {
+	return client.ServiceURL("projects")
+}