COSMO on serialbox2

Core

• Add support for std::experimental::filesystem as a replacement for boost::filesystem (to remove a dependency)
• Replace boost::log by a simple std::cout-based logger

Fortran interface

• New convention: A n-dimensional fortran array (n<=4) will be written as a n-dimensional field by serialbox (no interpretation of size=1 as non-existent dimension). If a dimension does not exist we pass -1 in the strides and 0 in the dimensions from the FortranWrapper to C.

Python

• Port visualizer from serialbox1
• Add compare.py (replacement for the c++ compare tool of serialbox1)

pp_ser

• Possiblity to pass an extra module via --module (used e.g. for COSMO specific code -> tracers)
• Parse and rename a single file via --output, -o

STELLA

• Adapt Serializer: The serializer includes the needed headers from STELLA and
  defines the correct API for writing and reading into/from a
  STELLA data field. The information about the storage directions
  and the strides is inferred from the field itself. The interface
  to initialize a field has been removed.
• Adapt to new convention in the Fortran interface