Issue 288 - Appveyor build

After a lot of fiddling around, I have created a script that runs the builds and tests under Appveyor and uploads nunit2 format xml files for display in its test tab. See our build 1.0.68 for an example.

There's a problem and I'm not sure whether to proceed further. The uploading of the nunit result files takes about as long as the running of the tests. Then when you go to display the test tab you can expect to wait a long time because it downloads the entries for every one of our 15000 plus test cases!

A further problem is that you can't tell which build caused the framework test failures from the display. This may be fixable if we decide to proceed with Appveyor.

What do you think? Should this be merged with or without the file upload? Without it, you have to scan down the console display to find the results at the end.