Update openbox configs to use alternatives

In crunchbang.org/forums/viewtopic.php?pid=307892 we were talking about changing the openbox config files to use more of the debian alternatives instead of hardcoded apps, that way when you change default apps, the shortcut keys are updated too. I went ahead and 

Also, I would have changed more, but there is a bug in terminator that won't be fixed until v1.0 : https://bugs.launchpad.net/terminator/+bug/366644


Keep up the good work, I'm looking forward to  Janice.