MSC split out progress

Hey, just a small head up. I rebased the holger/msc branch and also moved the mncc bits into the libmsc. I'm currently in Essen and should be able to test these patches tomorrow. One thing that keeps me from pushing (after having tested) is the following observation. For going from layer3 to layer4 we currently have a queue, for my patches when going from layer2 to layer3 I have a direct callback. Should I change that to use the same queuing approach? holger