removed old readme file
added cmake dependency: libviennamaterials.a/.so -> libviennamini.a/.so

now parallel builds are supported, e.g., -j4
cmake now configures device_collection.hpp.in

device_collection.hpp provides the inlined
viennamini::device_collection_path() function, providing the path to the
devices on various platforms
device class can now read and write netgen files
device class can now detect interfaces: contact-semicon-oxide
quicksafe: working on outsourcing the poisson-dd part.

not sure if this is the proper way to do it. need to investigate new
viennafvm, and storage approach to get an idea how to handle
the input and output data of the viennafvm simulation