Added PHP 5.4 requirement and fixed code comment

Author: kamermans

composer.json

@@ -8,6 +8,9 @@
             "email": "[email protected]"
         }
     ],
+    "require": {
+        "php": ">=5.4"
+    },
     "autoload": {
         "psr-4": {
             "kamermans\\Command\\" : ["src/","test/"]

src/ProcessManager.php

@@ -23,11 +23,6 @@ public function __construct($cmd, &$buffers)
     /**
      * Executes a command returning the exitcode and capturing the stdout and stderr
      *
-     * @param string $cmd
-     * @param array &$buffers
-     *  0 - StdIn contents to be passed to the command (optional)
-     *  1 - StdOut contents returned by the command execution
-     *  2 - StdOut contents returned by the command execution
      * @param callable $callback  A callback function for stdout/stderr data
      * @param bool $callbacklines Call callback for each line
      * @param int $buffer_size Read this many bytes at a time