Merge branch 'updated_io' into 'master'
Compressed i/o This adds gzip compression to the datasets within the HDF5 outputs. That can save a lot of storage space for arrays that are constant (mass,...) or similar/regular (IDs, h, ...). We can play with the chunk sizes and compression levels later on, when we have "real" runs and a parameter file. It "solves" issue #106. Feel free to remove the source branch. See merge request !98