下面的五句话是什么意思？一个有图标(icon)可执行文件的资源块
是不是可以只有first RT_ICON一个资源？
first "TYPELIB"和all "REGISTRY"又代表了什么？
experimentally. You will want to keep uncompressed the following resources:
* first RT_ICON should be kept
* first RT_GROUP_ICON should be kept
* first RT_VERSION should be kept
* first "TYPELIB" should be kept
* all "REGISTRY" should be kept
