Win32Exception Regression and others

Quick patch to resolve regression with Win32Exception issue on logon per issue #168.

Small number of other items and prepartion for releasing this.

Please note: I believe we agree we need some specialized exceptions.  In order to do so, additional time is needed to review how things are currently working.  For now, it seems best to do a quick release of waffle-jna as 1.7.1 to patch this issue.