Initial code cleanup of `Command.php`.

No functional changes, only modifications of documentation and code layout.

src/Command.php

 <?php
-
 /*
  * This file is part of the TelegramBot package.
  *
@@ -7,37 +6,117 @@
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
-*/
+ */
+
 namespace Longman\TelegramBot;
 
+use Longman\TelegramBot\Entities\Chat;
 use Longman\TelegramBot\Entities\Update;
 use Longman\TelegramBot\Entities\User;
-use Longman\TelegramBot\Entities\Chat;
 
 abstract class Command
 {
+    /**
+     * Telegram object
+     *
+     * @var Telegram
+     */
     protected $telegram;
+
+    /**
+     * Update object
+     *
+     * @var Entities\Update
+     */
     protected $update;
+
+    /**
+     * Message object
+     *
+     * @var Entities\Message
+     */
     protected $message;
+
+    /**
+     * Command
+     *
+     * @var string
+     */
     protected $command;
 
-    protected $public = false;
+    /**
+     * Name
+     *
+     * @var string
+     */
+    protected $name = '';
+
+    /**
+     * Description
+     *
+     * @var string
+     */
     protected $description = 'Command help';
+
+    /**
+     * Usage
+     *
+     * @var string
+     */
     protected $usage = 'Command usage';
+
+    /**
+     * Version
+     *
+     * @var string
+     */
     protected $version = '1.0.0';
-    protected $need_mysql = false;
+
+    /**
+     * If this command is enabled
+     *
+     * @var boolean
+     */
     protected $enabled = true;
-    protected $name = '';
 
+    /**
+     * If this command is public
+     *
+     * @var boolean
+     */
+    protected $public = false;
+
+    /**
+     * If this command needs mysql
+     *
+     * @var boolean
+     */
+    protected $need_mysql = false;
 
+    /**
+     * Command config
+     *
+     * @var array
+     */
     protected $config;
 
+    /**
+     * Constructor
+     *
+     * @param Telegram $telegram
+     */
     public function __construct(Telegram $telegram)
     {
         $this->telegram = $telegram;
         $this->config = $telegram->getCommandConfig($this->name);
     }
 
+    /**
+     * Set update object
+     *
+     * @param Entities\Update $update
+     * @return Command
+     */
     public function setUpdate(Update $update)
     {
         $this->update = $update;
@@ -45,6 +124,11 @@ abstract class Command
         return $this;
     }
 
+    /**
+     * Pre-execute command
+     *
+     * @return mixed
+     */
     public function preExecute()
     {
         if (!$this->need_mysql |
@@ -55,25 +139,48 @@ abstract class Command
         return $this->executeNoDB();
     }
 
+    /**
+     * Execute command
+     */
     abstract public function execute();
 
-    // this methods is executed if $need_mysql is true
-    // but DB connection for some reason is not avaiable
+    /**
+     * This methods is executed if $need_mysql is true
+     * but DB connection for some reason is not avaiable
+     */
     public function executeNoDB()
     {
 
     }
 
+    /**
+     * Get update object
+     *
+     * @return Entities\Update
+     */
     public function getUpdate()
     {
         return $this->update;
     }
 
+    /**
+     * Get message object
+     *
+     * @return Entities\Message
+     */
     public function getMessage()
     {
         return $this->message;
     }
 
+    /**
+     * Get command config
+     *
+     * @todo Returns need looking at!
+     *
+     * @param string $name
+     * @return mixed
+     */
     public function getConfig($name = null)
     {
         if (isset($this->config[$name])) {
@@ -85,42 +192,83 @@ abstract class Command
         return $this->config;
     }
 
+    /**
+     * Get telegram object
+     *
+     * @return Telegram
+     */
     public function getTelegram()
     {
         return $this->telegram;
     }
 
+    /**
+     * Set command
+     *
+     * @param string $command
+     * @return Command
+     */
     public function setCommand($command)
     {
         $this->command = $command;
         return $this;
     }
 
+    /**
+     * Get usage
+     *
+     * @return string
+     */
     public function getUsage()
     {
         return $this->usage;
     }
 
+    /**
+     * Get version
+     *
+     * @return string
+     */
     public function getVersion()
     {
         return $this->version;
     }
 
+    /**
+     * Get description
+     *
+     * @return string
+     */
     public function getDescription()
     {
         return $this->description;
     }
 
+    /**
+     * Get name
+     *
+     * @return string
+     */
     public function getName()
     {
         return $this->name;
     }
 
+    /**
+     * Check if command is enabled
+     *
+     * @return boolean
+     */
     public function isEnabled()
     {
         return $this->enabled;
     }
 
+    /**
+     * Check if command is public
+     *
+     * @return boolean
+     */
     public function isPublic()
     {
         return $this->public;