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

grunt.js

@@ -0,0 +1,67 @@
+module.exports = function(grunt) {
+  grunt.initConfig({
+    pkg: '<json:package.json>',
+    meta: {
+      banner: '/*! Roots <%= pkg.version %> - <%= pkg.homepage %> */'
+    },
+    lint: {
+      files: ['grunt.js', 'assets/js/_*.js']
+    },
+    recess: {
+      dist: {
+        src: [
+          'assets/css/less/bootstrap/bootstrap.less',
+          'assets/css/less/bootstrap/responsive.less',
+          'assets/css/less/app.less'
+        ],
+        dest: 'assets/css/main.css',
+        options: {
+          compile: true
+        }
+      }
+    },
+    concat: {
+      js: {
+        src: [
+          'assets/js/plugins/bootstrap/bootstrap-transition.js',
+          'assets/js/plugins/bootstrap/bootstrap-alert.js',
+          'assets/js/plugins/bootstrap/bootstrap-button.js',
+          'assets/js/plugins/bootstrap/bootstrap-carousel.js',
+          'assets/js/plugins/bootstrap/bootstrap-collapse.js',
+          'assets/js/plugins/bootstrap/bootstrap-dropdown.js',
+          'assets/js/plugins/bootstrap/bootstrap-modal.js',
+          'assets/js/plugins/bootstrap/bootstrap-tooltip.js',
+          'assets/js/plugins/bootstrap/bootstrap-popover.js',
+          'assets/js/plugins/bootstrap/bootstrap-scrollspy.js',
+          'assets/js/plugins/bootstrap/bootstrap-tab.js',
+          'assets/js/plugins/bootstrap/bootstrap-typeahead.js',
+          'assets/js/plugins/*.js',
+          'assets/js/_*.js'
+        ],
+        dest: 'assets/js/scripts.js'
+      }
+    },
+    min: {
+      dist: {
+        src: ['<banner>', 'assets/js/scripts.js'],
+        dest: 'assets/js/scripts.min.js'
+      }
+    },
+    mincss: {
+      compress: {
+        files: {
+          'assets/css/main.min.css': ['assets/css/main.css']
+        }
+      }
+    },
+    watch: {
+      files: ['<config:lint.files>', 'assets/css/less/*.less', 'less/assets/less/bootstrap/*.less'],
+      tasks: 'default'
+    }
+  });
+
+  grunt.loadTasks('build/tasks');
+  grunt.registerTask('default', 'lint recess concat min mincss enqueue_ver');
+  grunt.loadNpmTasks('grunt-contrib');
+  grunt.loadNpmTasks('grunt-recess');
+};