Port to gtk3

A couple of things:

- 957c701 and a531c5c remove the old php based buildscripts. We don't need them in any case and it is just messy and annoying having them around

- The same goes for the auto generated files (b12d149): Every commit becomes bloated with irrelevant data. If someone has the gcc toolchain and make but not the autotools installed then I guess they are just shit out of luck in this case, but I don't think this will be the case in general

- Moving the automake scripts out of the root (2b2aba0) is also increasing the clarity

I think that these commits could be merged into the other branches as well.

The actual port to gtk3 (99ba1ea) compiles and generally works, but it is untested and still has some problems. I will try to remove some redundant parts and make everything consistent with the gtk3 look and feel as soon as I get the chance. This will certainly require some more work though.