Integrate DelayedArray framework into genomation

[katwre]

On the Bioc Meeting 2018 people advertised SummarizedExperiment R package for working on matrix-like objects. I got suggestions to check out Delayedarrayes and to think about integrating it to genomation. DelayedArray framework supports the HDF5 on-disk backend and was developed by Hervé Pagès (Bioconductor Core Team).