phpword Unsupported image type image/x-ms-bmp

phpword0.12版本的TemplateProcessor（模板替换）无法插入mime为image/x-ms-bmp的图片，因为addImageToRelations方法中没有对于image/x-ms-bmp的支持，所需要修改源码

在TemplateProcessor.php的第499行

原代码
$extTransform = array(
    'image/jpeg' => 'jpeg',
    'image/png'  => 'png',
    'image/bmp'  => 'bmp',
    'image/gif'  => 'gif',
);

修改后代码
$extTransform = array(
    'image/jpeg' => 'jpeg',
    'image/png'  => 'png',
    'image/bmp'  => 'bmp',
    'image/gif'  => 'gif',
    'image/x-ms-bmp'  => 'bmp'
);