Add VS project files for tests and run tests in AppVeyor
Check that _MSC_VER is set
Make AppVeyor fail on failure
Switch back to older version of libtap
Specify exes directly rather than using forfiles
Don't try to run threads test
Fix config header and quiet some warnings
Tidy regen script
Revert accidental failing test
Update changes
Merge pull request #59 from maxmind/greg/vs-tests

Add Visual Studio projects for tests. Test in AppVeyor. Fix config header.