Fix issue 21

[itziakos]

fixes #22

[itziakos]

@cournape, This PR is ready for review.

The problem was that the callback functions receive the resource type and resource name as a pointer to wchar. But the value of the pointer passes the IS_INTRESOURCE check that it is interprated as an integer index inastead of a string (see https://msdn.microsoft.com/en-us/library/windows/desktop/ms648041%28v=vs.85%29.aspx)

The solutiuon is to claim the input types are LPVOID and wrap the user provided callback in order to convert them into python frieadly types. This results in similar output with the origin win32api library.

The error was not visible before because the python.exedoes not have resource types defined by name. I have use alternative files that should exist on all windows platforms.

The tests pass locally and if #24 is merged then we can also check that they pass on Travis-CI

[itziakos]

I merged #24 into this PR so that I can run the tests on travis-ci

[itziakos]

closing to make PR against #24 so that it is easier to review