Change default usage for form groups to be in BS3 normal form

Remove the default classes added to the label and input fields. This
allows usage in any type of bootstrap form. Applications can simply add
the classes via the pfLabelClass and pfInputClass bindings to use in a
horizontal form.

Added examples of both use cases.

Author: jeff-phillips-18

src/form/examples/form-group.js

@@ -17,21 +17,31 @@
  <example module="patternfly.form">
 
    <file name="index.html">
-     <form class="form-horizontal" ng-controller="FormDemoCtrl">
-
+     <div ng-controller="FormDemoCtrl">
        <p>Name: {{ item.name }}</p>
        <p>Description: {{ item.description }}</p>
-       <pf-form-group pf-label="Name" required>
-         <input id="name" name="name"
-                ng-model="item.name" type="text" required/>
-       </pf-form-group>
-
-       <pf-form-group pf-input-class="col-sm-9" pf-label="Description">
-         <textarea id="description" name="description" ng-model="item.description">
-           {{ item.description }}
-         </textarea>
-       </pf-form-group>
-     </form>
+       <form>
+         <pf-form-group pf-label="Name" required>
+           <input id="name" name="name" ng-model="item.name" type="text" required/>
+         </pf-form-group>
+         <pf-form-group pf-label="Description">
+           <textarea id="description" name="description" ng-model="item.description">
+             {{ item.description }}
+           </textarea>
+         </pf-form-group>
+       </form>
+       <p>Horizontal Form</p>
+       <form class="form-horizontal">
+         <pf-form-group pf-label="Name" required pf-label-class="col-sm-2" pf-input-class="col-sm-5">
+           <input id="name" name="name" ng-model="item.name" type="text" required/>
+         </pf-form-group>
+         <pf-form-group pf-label="Description" pf-label-class="col-sm-2" pf-input-class="col-sm-5">
+           <textarea id="description" name="description" ng-model="item.description">
+             {{ item.description }}
+           </textarea>
+         </pf-form-group>
+       </form>
+     </div>
    </file>
 
    <file name="script.js">

src/form/form-group/form-group.component.js

@@ -19,19 +19,8 @@ angular.module('patternfly.form').component('pfFormGroup', {
     var ctrl = this;
 
     ctrl.$postLink = function () {
-      var input;
-      var type;
-
-      if (!ctrl.pfLabelClass) {
-        ctrl.pfLabelClass = 'col-sm-2';
-      }
-
-      if (!ctrl.pfInputClass) {
-        ctrl.pfInputClass = 'col-sm-5';
-      }
-
-      input = getInput($element);
-      type = input.attr('type');
+      var input = getInput($element);
+      var type = input.attr('type');
 
       if (['checkbox', 'radio', 'time'].indexOf(type) === -1) {
         input.addClass('form-control');