added help:commands task to artisan

laravel/cli/tasks/help.php

@@ -0,0 +1,35 @@
+<?php namespace Laravel\CLI\Tasks;
+
+use Laravel\Str;
+use Laravel\File;
+
+class Help extends Task {
+
+	/**
+	 * List 
+	 *
+	 * @param  array  $arguments
+	 * @return void
+	 */
+	public function commands()
+	{
+
+		$command_data = json_decode(file_get_contents(__DIR__.'/help.json'));
+
+		$i=0;
+
+		foreach($command_data as $category => $commands)
+		{
+
+			if($i++ != 0) echo PHP_EOL;
+
+			echo PHP_EOL . "# $category" . PHP_EOL;
+
+			foreach($commands as $command => $details)
+			{
+				echo PHP_EOL . str_pad($command, 20) . str_pad($details->description, 30);
+			}
+		}
+	}
+
+}