Mswin32 paths

Did some testing with 0.004_02 on MSWin32 and ran into these two problems:

 1. Alien::Base is trying to dl load static libraries which doesn't stop the program or fail tests, but it pops up a very annoying dialog on windows.
 2. The share directory target is using \ for path separators is very tricky to get correct on Windows, and even though / is not the default it is better to use.