feat(ionic): remove all delegates

BREAKING CHANGE: $ionicScrollDelegate, $ionicSlideBoxDelegate, and
$ionicSideMenuDelegate have been removed.

  - $ionicScrollDelegate has been changed to $ionicScrollController.
    Documentation:
    [ionContent](
    http://ajoslin.github.io/docs/nightly/api/directive/ionContent),
    [ionScroll](
    http://ajoslin.github.io/docs/nightly/api/directive/ionScroll)

    Change your code from this:

    ```html
    <ion-content ng-controller="MyCtrl">
      <button ng-click="scrollBottom()">Scroll to bottom!</button>
    </ion-content>
    ```
    ```js
    function MyCtrl($scope, $ionicScrollDelegate) {
      $scope.scrollBottom = function() {
        $ionicScrollDelegate.scrollBottom();
      };
    }
    ```

    To this:

    ```html
    <!-- optional attr controller-bind, see docs -->
    <ion-content ng-controller="MyCtrl">
      <button ng-click="scrollBottom()">Scroll to bottom!</button>
    </ion-content>
    ```
    ```js
    function MyCtrl($scope) {
      $scope.scrollBottom = function() {
        $scope.$ionicScrollController.scrollBottom();
      };
    }
    ```

  - $ionicSideMenuDelegate has been changed to
    $ionicSideMenusController. Documentation:
    [ionSideMenus](http://ajoslin.github.io/docs/nightly/api/directive/ionSideMenus)

    Change your code from this:

    ```html
    <ion-side-menus>
      <ion-side-menu side="left">Side Menu Left</ion-side-menu>
      <ion-pane ion-side-menu-content ng-controller="MyCtrl">
        <button ng-click="toggleLeftMenu()">
          Toggle Left Menu!
        </button>
      </ion-pane>
    </ion-side-menus>
    ```
    ```js
    function MyCtrl($scope, $ionicSideMenuDelegate) {
      $scope.toggleLeftMenu = function() {
        $ionicSideMenuDelegate.toggleLeft();
      };
    }
    ```

    To this:

    ```html
    <!-- optional attr controller-bind, see documentation -->
    <ion-side-menus>
      <ion-side-menu side="left">Side Menu Left</ion-side-menu>
      <ion-pane ion-side-menu-content ng-controller="MyCtrl">
        <button ng-click="toggleLeftMenu()">
          Toggle Left Menu!
        </button>
      </ion-pane>
    </ion-side-menus>
    ```
    ```js
    function MyCtrl($scope) {
      $scope.toggleLeftMenu = function() {
        $scope.$ionicSideMenuController.toggleLeft();
      };
    }
    ```

  - $ionicSlideBoxDelegate has been removed and upgraded to
    $ionicSlideBoxController. It had only one method that
    was unneeded.  [Documentation](
    http://ajoslin.github.io/docs/nightly/api/directive/ionSlideBox)

js/ext/angular/src/directive/ionicContent.js

@@ -1,7 +1,7 @@
 (function() {
 'use strict';
 
-angular.module('ionic.ui.content', ['ionic.ui.service', 'ionic.ui.scroll'])
+angular.module('ionic.ui.content', ['ionic.ui.scroll'])
 
 /**
  * Panel is a simple 100% width and height, fixed panel. It's meant for content to be
@@ -28,6 +28,8 @@ angular.module('ionic.ui.content', ['ionic.ui.service', 'ionic.ui.scroll'])
  * @ngdoc directive
  * @name ionContent
  * @module ionic
+ * @controller ionicScroll as $scope.$ionicScrollController
+ * @restrict E
  *
  * @description
  * The ionContent directive provides an easy to use content area that can be configured
@@ -45,6 +47,9 @@ angular.module('ionic.ui.content', ['ionic.ui.service', 'ionic.ui.scroll'])
  * Use the classes 'has-header', 'has-subheader', 'has-footer', and 'has-tabs'
  * to modify the positioning of the ion-content relative to surrounding elements.
  *
+ * @param {string=} controller-bind The scope variable to bind this element's scrollView's
+ * {@link ionic.controller:ionicScroll ionicScroll controller} to.
+ * Default: $scope.$ionicScrollController.
  * @param {boolean=} padding Whether to add padding to the content.
  * of the content.  Defaults to true on iOS, false on Android.
  * @param {boolean=} scroll Whether to allow scrolling of content.  Defaults to true.
@@ -67,6 +72,7 @@ function($parse, $timeout, $controller, $ionicBind) {
     transclude: true,
     require: '^?ionNavView',
     scope: true,
+    priority: 501,
     template:
     '<div class="scroll-content">' +
       '<div class="scroll"></div>' +
@@ -97,9 +103,11 @@ function($parse, $timeout, $controller, $ionicBind) {
           scrollEventInterval: '@'
         });
 
-        $scope.$watch($attr.padding, function(newVal) {
-          scrollContent.toggleClass('padding', !!newVal);
-        });
+        if (angular.isDefined($attr.padding)) {
+          $scope.$watch($attr.padding, function(newVal) {
+            scrollContent.toggleClass('padding', !!newVal);
+          });
+        }
 
         if ($scope.scroll === "false") {
           //do nothing
@@ -111,6 +119,7 @@ function($parse, $timeout, $controller, $ionicBind) {
             $scope: $scope,
             scrollViewOptions: {
               el: $element[0],
+              controllerBind: $attr.controllerBind,
               bouncing: $scope.$eval($scope.hasBouncing),
               startX: $scope.$eval($scope.startX) || 0,
               startY: $scope.$eval($scope.startY) || 0,
@@ -128,7 +137,7 @@ function($parse, $timeout, $controller, $ionicBind) {
             }
           });
           //Publish scrollView to parent so children can access it
-          scrollView = $scope.$parent.scrollView = scrollCtrl.scrollView;
+          scrollView = scrollCtrl.scrollView;
         }
 
         transclude($scope, function(clone) {
@@ -227,7 +236,7 @@ function($parse, $timeout, $controller, $ionicBind) {
           $onPulling: '&onPulling'
         });
 
-        scrollCtrl.setRefresher($scope, $element[0]);
+        scrollCtrl._setRefresher($scope, $element[0]);
         $scope.$on('scroll.refreshComplete', function() {
           $element[0].classList.remove('active');
           scrollCtrl.scrollView.finishPullToRefresh();