add missing auto-size directive to search box, related to dnauck#5

Author: dnauck

src/angular-advanced-searchbox.html

@@ -26,6 +26,7 @@
         <input name="searchbox"
                class="search-parameter-input"
                type="text"
+               nit-auto-size-input
                nit-set-focus="setSearchFocus"
                ng-keydown="keydown($event)"
                placeholder="{{placeholder}}"