Layout fixes in COPYING (and use spaces instead of tabs). Use a fixed width...

Layout fixes in COPYING (and use spaces instead of tabs). Use a fixed width font in when displaying the license in the qt4 help window (since that's how it's meant to be displayed).

modules/gui/qt4/dialogs/help.cpp

@@ -114,6 +114,7 @@ AboutDialog::AboutDialog( intf_thread_t *_p_intf) :  QVLCFrame( _p_intf )
 
     /* GPL License */
     QTextEdit *licenseEdit = new QTextEdit( this );
+    licenseEdit->setFontFamily( "Monospace" );
     licenseEdit->setText( qfu( psz_license ) );
     licenseEdit->setReadOnly( true );