Set up Grunt

Fixing up Grunt file to watch for directories

Exclude node modules folder from Jekyll built site

node_modules/grunt-concurrent/tasks/concurrent.js

@@ -0,0 +1,59 @@
+'use strict';
+var os = require('os');
+var padStdio = require('pad-stdio');
+var async = require('async');
+var cpCache = [];
+
+module.exports = function (grunt) {
+	grunt.registerMultiTask('concurrent', 'Run grunt tasks concurrently', function () {
+		var spawnOptions;
+		var cb = this.async();
+		var options = this.options({
+			limit: Math.max((os.cpus().length || 1) * 2, 2)
+		});
+		// Set the tasks based on the config format
+		var tasks = this.data.tasks || this.data;
+
+		// Warning if there are too many tasks to execute within the given limit
+		if (options.limit < tasks.length) {
+			grunt.log.oklns(
+				'Warning: There are more tasks than your concurrency limit. After ' +
+				'this limit is reached no further tasks will be run until the ' +
+				'current tasks are completed. You can adjust the limit in the ' +
+				'concurrent task options'
+			);
+		}
+
+		// Optionally log the task output
+		if (options.logConcurrentOutput) {
+			spawnOptions = { stdio: 'inherit' };
+		}
+
+		padStdio.stdout('    ');
+		async.eachLimit(tasks, options.limit, function (task, next) {
+			var cp = grunt.util.spawn({
+				grunt: true,
+				args: [task].concat(grunt.option.flags()),
+				opts: spawnOptions
+			}, function (err, result, code) {
+				if (err || code > 0) {
+					grunt.warn(result.stderr || result.stdout);
+				}
+				grunt.log.writeln('\n' + result.stdout);
+				next();
+			});
+
+			cpCache.push(cp);
+		}, function () {
+			padStdio.stdout();
+			cb();
+		});
+	});
+};
+
+// make sure all child processes are killed when grunt exits
+process.on('exit', function () {
+	cpCache.forEach(function (el) {
+		el.kill();
+	});
+});