Windows compatibility

When building on Windows 7 & 8 there were several Unit test failures due to Windows specific differences like file separator and file encoding. These changes cover I think most of the basic Windows compatibility issues in the nodyn-verticle sub-project, and gets this sub-project building successfully. I used the nodejs documentation where possible to find the expected functionality. This is related to the discussion @ https://groups.google.com/d/msg/vertx/VBQujFCRYAs/vAPCPDHjBSAJ