Removed pocketmine subdirectory, map PSR-4 style

composer.json

@@ -42,7 +42,7 @@
    },
    "autoload": {
       "psr-4": {
-         "": ["src"]
+         "pocketmine\\": "src/"
       }
    },
    "autoload-dev": {

src/PocketMine.php

@@ -146,7 +146,7 @@ namespace pocketmine {
 		if(\Phar::running(true) !== ""){
 			define('pocketmine\PATH', \Phar::running(true) . "/");
 		}else{
-			define('pocketmine\PATH', dirname(__FILE__, 3) . DIRECTORY_SEPARATOR);
+			define('pocketmine\PATH', dirname(__FILE__, 2) . DIRECTORY_SEPARATOR);
 		}
 
 		$opts = getopt("", ["bootstrap:"]);