v1.4.0rc1

• The repository interface to Zenodo has one single upload method upload_file with the parameter metamapper. It
  is a callable which extracts meta information from the actual file to be uploaded. This is especially useful and specifically
  intended for HDF5 files. Unless the value for metamapper is None, the upload_file method will use the built-in
  hdf5 extraction function automatically on HDF5 files.
• Clarify abstraction for HDF5 database interfaces. HDF5DBInterface is the top abstraction from which
  ExtHDF5Interface inherits. ExtHDF5Interface makes use of external databases such as mongoDB.
• fix issue in online documentation: mongomock is used to run the mongodb jupyter notebook in the documentation
• codemeta.json file is updated with author and institution ROR ID