path.normalize("#{files.orig.dest}") on windows

on Windows the `path.normalize("#{files.orig.dest}")` in `stripDestPath()` causes asset URLs in generated files to not be rewritten due to the fact that URLs always have '/''s which does not align with windows directory slashes - in the default situation you get "files\" ... which will never match.

I assume that the path.normalize is in there to fudge any ./ or ../ ... but is that really necessary here?
Merge pull request #5 from Dockbite/feature/fixAssetPathReplacement

path.normalize("#{files.orig.dest}") on windows