Update Twitter Bootstrap upto v3.1.1.

_assets/vendor/bootstrap/docs/jade/customizer-nav.jade

@@ -0,0 +1,15 @@
+// NOTE: DO NOT EDIT THE FOLLOWING SECTION DIRECTLY! It is autogenerated via the `build-customizer-html` Grunt task using the customizer-nav.jade template.
+li
+  a(href='#less') Less components
+li
+  a(href='#plugins') jQuery plugins
+li
+  a(href='#less-variables') Less variables
+  ul.nav
+    each section in sections
+      if section.customizable
+        li
+          a(href='#'+section.id)= section.heading
+li
+  a(href='#download') Download
+// NOTE: DO NOT EDIT THE PRECEDING SECTION DIRECTLY! It is autogenerated via the `build-customizer-html` Grunt task using the customizer-nav.jade template.

_assets/vendor/bootstrap/docs/jade/customizer-variables.jade

@@ -0,0 +1,21 @@
+// NOTE: DO NOT EDIT THE FOLLOWING SECTION DIRECTLY! It is autogenerated via the `build-customizer-html` Grunt task using the customizer-variables.jade template.
+each section in sections
+  if section.customizable
+    h2(id=section.id)= section.heading
+    if section.docstring
+      p!= section.docstring.html
+    each subsection in section.subsections
+      if subsection.heading
+        h3(id=subsection.id)= subsection.heading
+      div.row
+        each variable in subsection.variables
+          div.bs-customizer-input
+            label(for="input-" + variable.name)= variable.name
+            input.form-control(
+              id="input-" + variable.name
+              type="text"
+              value=variable.defaultValue
+              data-var=variable.name)
+            if variable.docstring
+              p.help-block!= variable.docstring.html
+// NOTE: DO NOT EDIT THE PRECEDING SECTION DIRECTLY! It is autogenerated via the `build-customizer-html` Grunt task using the customizer-variables.jade template.