Clarify instructions for building on -msvc #47
Description
The instructions currently tell people to download the dllw4 version of iup which does not come with .lib libraries and is unsuitable for use with -msvc. For those targets the instructions should tell the user to download the dll12 version instead which definitely has .lib files. The instructions should also inform the user to place the .lib files where the linker can find them and not the .dll files. Also perhaps the instructions should tell the user how to use a build script override to tell it where to look for the .lib and .dll files instead of stuffing those files all over the place in weird directories.