fixes to src and binding.byp to allow windows installation
Merge branch 'win-fixes' of git://github.com/adube/node-mapserv into adube-win-fixes
Revert an unnecessary change

I think this was implemented to prevent a situation where the module
segfaulted.  This has hopefully been cleared up with the recently
revamped configuration process in the build system.
Document the Windows installation process

This is based on comments in pull reques #9.