add Qt project

Here is a working [http://qt-project.org/](Qt) project with optionnal coverage data setup (tested on MacOS).
I struggled quite a bit to measure [my own project](https://github.com/Phonations/Joker) code coverage with http://coveralls.io, mostly because the service and the [connector](https://github.com/eddyxu/cpp-coveralls) was still buggy but now it works quite well.
You can have a look at the project running unit test: https://github.com/Phonations/Joker/blob/master/tests/AutoTest/AutoTest.pro#L15-L16