Windows安装文件(.MSI)创建工具，msitools 0.93 发布

msitools是一个工具集合用于检查和创建Windows安装文件 (.MSI)。它基于libmsi实现，一个便携的.MSI文件读写库。在交叉编译环境中它非常实用，比如Fedora MinGW。

发布说明: Wixl, the little WiX compiler, learned a few things, like preprocessor conditions, 64-bit and per-user builds, and some support for CustomAction or MajorUpgrade.