added IT related schools from vienna, austria

I added some of the so called "HTL"s from vienna to the database. Unfortunately windows removed the school "nul" and I saw that after the commit and push to my repo. I fixed it with some dirty commits...
Also I added two schools that are using the subdomain 'htl'. It's not working any other way...

PS: A HTL is something like a technical college. Nobody really knows how to translate it...
PPS: please excuse my typo in the first commit. It's late :D