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.less

@@ -0,0 +1,48 @@
+/*!
+ * Bootstrap Responsive v2.1.1
+ *
+ * Copyright 2012 Twitter, Inc
+ * Licensed under the Apache License v2.0
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Designed and built with all the love in the world @twitter by @mdo and @fat.
+ */
+
+
+// Responsive.less
+// For phone and tablet devices
+// -------------------------------------------------------------
+
+
+// REPEAT VARIABLES & MIXINS
+// -------------------------
+// Required since we compile the responsive stuff separately
+
+@import "variables.less"; // Modify this for custom colors, font-sizes, etc
+@import "mixins.less";
+
+
+// RESPONSIVE CLASSES
+// ------------------
+
+@import "responsive-utilities.less";
+
+
+// MEDIA QUERIES
+// ------------------
+
+// Large desktops
+@import "responsive-1200px-min.less";
+
+// Tablets to regular desktops
+@import "responsive-768px-979px.less";
+
+// Phones to portrait tablets and narrow desktops
+@import "responsive-767px-max.less";
+
+
+// RESPONSIVE NAVBAR
+// ------------------
+
+// From 979px and below, show a button to toggle navbar contents
+@import "responsive-navbar.less";