additional_generators: Added doctests to reformat_slices and len_slices. This closes #57 and closes #58.
HDF5_serializers: Removed file handle portion as this does not work and sometimes closes the wrong file.
HDF5_serializers: Fixed so that it can now read single numbers from HDF5 Datasets.
HDF5_cacher: WIP. A possible method of granular resume and organized debug output.