Adding *.iss file under Conf (InnoSetup files)

InnoSetup use the config file syntax for setup scripts.
File to try with:
https://github.com/nightingale-media-player/nightingale-hacking/blob/sb-trunk-oldxul/installer/windows/Nightingale.iss

![capture_iss](https://f.cloud.github.com/assets/119288/1081271/f8ce5ae8-1573-11e3-8ce1-d015f6b88a9b.PNG)