Update with latest changes for publication of thesis.

Added Polynomial Channel Model and its parameters for all phantoms an…

…d TX/RX locations

Fixed missing **kwargs in layer_model.impulse_response()

Include radiation loss into path loss and capacity

Add **kwargs to `LayerModel.path_loss()` and `LayerModel.capacity()` to
pass arguments to `LayerModel.transfer_function()`.

Merge branch 'master' of collaborating.tuhh.de:int/in-body/layermodel…

…_lib

Version 1.1

Initial release.