add homepage

quick design from cubes at homepage

src/main/webapp/org/cboard/view/cboard/homepage.html

 <section class="content-header">
     <h1>
         HOMEPAGE
-        <small>Preview</small>
+        <small>Quick Start</small>
     </h1>
     <ol class="breadcrumb">
         <li><a href=""><i class="fa fa-dashboard"></i> Home</a></li>
@@ -12,7 +12,7 @@
             <div class="col-md-4">
                 <div class="box box-solid">
                     <div class="box-header with-border">
-                        <i class="fa fa-cubes"></i> <h3 class="box-title ng-binding">Cubes</h3>
+                        <i class="fa fa-cubes"></i> <h3 class="box-title ng-binding">Cubes <small> Double click a cube, start chart design!</small></h3>
                         <div class="box-tools pull-right">
                             <i class="fa fa-plus-square-o toolbar-icon" ng-click="jstree_open_all()" title="Unflod all nodes"></i>
                             <i class="fa fa-minus-square-o toolbar-icon" ng-click="jstree_close_all()" title="Fold all nodes"></i>