Add grunt.js build script

- Move Bootstrap LESS files into new subdirectory

- Change app.css to app.less, add @import's to utilize
Bootstrap variables and mixins

- Remove plugins.js and main.js

- Move Bootstrap JS plugins into new subdirectory

- Add new _main.js file with example DOM-based routing
script that works off the WordPress body_class

- lib/scripts.php has been updated to remove all extra
CSS and JS files and also places JavaScript in the footer

assets/css/less/bootstrap/responsive-768px-979px.less

@@ -0,0 +1,19 @@
+//
+// Responsive: Tablet to desktop
+// --------------------------------------------------
+
+
+@media (min-width: 768px) and (max-width: 979px) {
+
+  // Fixed grid
+  #grid > .core(@gridColumnWidth768, @gridGutterWidth768);
+
+  // Fluid grid
+  #grid > .fluid(@fluidGridColumnWidth768, @fluidGridGutterWidth768);
+
+  // Input grid
+  #grid > .input(@gridColumnWidth768, @gridGutterWidth768);
+
+  // No need to reset .thumbnails here since it's the same @gridGutterWidth
+
+}