Remove all frameworks except Bootstrap (#251)

- Remove all frameworks except Bootstrap

- Remove roots-options.php and replace with a more simple
  roots-config.php

- Include all Bootstrap Javascript plugins by default in
  js/plugins.js

- Use Bootstrap Responsive and Topbar navigation by default

- Use Bootstrap markup on forms, page titles, image galleries,
  alerts and errors, post and comment navigation

- Remove Roots styles from style.css and introduce app.css for
  site-specific CSS. Remove almost all previous default Roots
  styles.

- Add latest updates from H5BP project

page.php

@@ -1,24 +1,20 @@
 <?php get_header(); ?>
   <?php roots_content_before(); ?>
-    <div id="content" class="<?php echo $roots_options['container_class']; ?>">
+    <div id="content" class="<?php echo CONTAINER_CLASSES; ?>">
     <?php roots_main_before(); ?>
-      <div id="main" class="<?php echo $roots_options['main_class']; ?>" role="main">
-        <div class="container">
-          <?php roots_loop_before(); ?>
-          <?php get_template_part('loop', 'page'); ?>
-          <?php roots_loop_after(); ?>
-        </div>
+      <div id="main" class="<?php echo MAIN_CLASSES; ?>" role="main">
+        <?php roots_loop_before(); ?>
+        <?php get_template_part('loop', 'page'); ?>
+        <?php roots_loop_after(); ?>
       </div><!-- /#main -->
     <?php roots_main_after(); ?>
     <?php roots_sidebar_before(); ?>
-      <aside id="sidebar" class="<?php echo $roots_options['sidebar_class']; ?>" role="complementary">
+      <aside id="sidebar" class="<?php echo SIDEBAR_CLASSES; ?>" role="complementary">
       <?php roots_sidebar_inside_before(); ?>
-        <div class="container">
-          <?php get_sidebar(); ?>
-        </div>
+        <?php get_sidebar(); ?>
       <?php roots_sidebar_inside_after(); ?>
       </aside><!-- /#sidebar -->
     <?php roots_sidebar_after(); ?>
     </div><!-- /#content -->
   <?php roots_content_after(); ?>
-<?php get_footer(); ?>
+<?php get_footer(); ?>