Nest controllers (#19)

This is the approach at organizing controllers I have decided on.  This
will match the URL structure that is provided from the Pinterest API and
will feel more fluent than the previous approach I was taking.

client.go

@@ -19,7 +19,6 @@ import (
 type Client struct {
 	Users         *controllers.UsersController
 	Boards        *controllers.BoardsController
-	BoardPins     *controllers.BoardPinsController
 	Pins          *controllers.PinsController
 	wreckerClient *wrecker.Wrecker
 }
@@ -39,7 +38,6 @@ func NewClient() *Client {
 	}
 	pinterestClient.Users = controllers.NewUsersController(pinterestClient.wreckerClient)
 	pinterestClient.Boards = controllers.NewBoardsController(pinterestClient.wreckerClient)
-	pinterestClient.BoardPins = controllers.NewBoardPinsController(pinterestClient.wreckerClient)
 	pinterestClient.Pins = controllers.NewPinsController(pinterestClient.wreckerClient)
 	return pinterestClient
 }

client_test.go

@@ -379,7 +379,7 @@ func (suite *ClientTestSuite) TestSuccessfulBoardCUD() {
 // TestSuccessfulBoardPinsFetch tests that a boards pins can be
 // fetched when everything was set up properly.
 func (suite *ClientTestSuite) TestSuccessfulBoardPinsFetch() {
-	pins, err := suite.client.BoardPins.Fetch("BrandonRRomano/go-pinterest", &controllers.BoardPinsFetchOptionals{})
+	pins, err := suite.client.Boards.Pins.Fetch("BrandonRRomano/go-pinterest", &controllers.BoardPinsFetchOptionals{})
 
 	assert.Equal(suite.T(), nil, err)
 	assert.Equal(suite.T(), len(*pins), 3)
@@ -394,7 +394,7 @@ func (suite *ClientTestSuite) TestSuccessfulBoardPinsFetch() {
 // TestNotFoundBoardPinsFetch tests that a 404 is thrown
 // when trying to access the pins of a board that does not exist
 func (suite *ClientTestSuite) TestNotFoundBoardPinsFetch() {
-	_, err := suite.client.BoardPins.Fetch(
+	_, err := suite.client.Boards.Pins.Fetch(
 		"BrandonRRomano/E20450921CE",
 		&controllers.BoardPinsFetchOptionals{},
 	)
@@ -413,7 +413,7 @@ func (suite *ClientTestSuite) TestNotFoundBoardPinsFetch() {
 // TestTimeoutBoardPinsFetch tests that an error is appropriately thrown
 // when a network timeout occurs
 func (suite *ClientTestSuite) TestTimeoutBoardPinsFetch() {
-	_, err := suite.timeoutClient.BoardPins.Fetch(
+	_, err := suite.timeoutClient.Boards.Pins.Fetch(
 		"BrandonRRomano/go-pinterest",
 		&controllers.BoardPinsFetchOptionals{},
 	)
@@ -423,7 +423,7 @@ func (suite *ClientTestSuite) TestTimeoutBoardPinsFetch() {
 // TestUnauthorizedBoardPinsFetch tests that an error is appropriately thrown
 // when the user makes an unauthorized request
 func (suite *ClientTestSuite) TestUnauthorizedBoardPinsFetch() {
-	_, err := suite.unauthorizedClient.BoardPins.Fetch(
+	_, err := suite.unauthorizedClient.Boards.Pins.Fetch(
 		"BrandonRRomano/go-pinterest",
 		&controllers.BoardPinsFetchOptionals{},
 	)

controllers/boards_controller.go

@@ -10,13 +10,16 @@ import (
 // https://developers.pinterest.com/docs/api/boards/
 type BoardsController struct {
 	wreckerClient *wrecker.Wrecker
+	Pins          *BoardPinsController
 }
 
 // NewBoardsController instantiates a new BoardsController.
 func NewBoardsController(wc *wrecker.Wrecker) *BoardsController {
-	return &BoardsController{
+	boardsController := &BoardsController{
 		wreckerClient: wc,
 	}
+	boardsController.Pins = NewBoardPinsController(wc)
+	return boardsController
 }
 
 // Fetch loads a board from the board_spec (username/board-slug)