ENSCORESW-139, ENSCORESW-126, ENSCORESW-164 and ENSCORESW-132. This commit brings in support for stripping out the Y chromosome from Human for all dumps (if required). We also add support for deleting previous runs going into the same dump location. Softmasked sequence is now created by default; hard masked is generated from this. We also produce an email summary of the results of the pipeline.

All is currently untested