Moved the __BEPSSpecInds function from createSpecVals to io.hdf_utils.py and renamed it to create_spec_inds_from_vals

Cades dev

Updated index.rst to link to the Gallery in the main toctree
Update to conf.py
Documentation updates to source files

Cades dev

First commit of the basic data loading, slicing, of datasets including an introduction to the data format

Rama new dev