allow descriptions for operands and show them in a separate table

Created by: tflori

this solves #125 (closed)

resources/localization/de.php

@@ -5,8 +5,9 @@ return [
     'usage-command' => 'Befehl',
     'usage-options' => 'Optionen',
     'usage-operands' => 'Operanden',
-    'options-title' => "Optionen:\n",
-    'commands-title' => "Befehle:\n",
+    'operands-title' => 'Operanden:' . PHP_EOL,
+    'options-title' => "Optionen:" . PHP_EOL,
+    'commands-title' => "Befehle:" . PHP_EOL,
     'option-unknown' => 'Unbekannte Option \'%s\' ist unknown',
     'no-more-operands' => 'Unerwarteter Operand %s',
     'operand-missing' => 'Operand %s muss angegeben werden',