Merge pull request #244 from guillermo-carrasco/develop

Refactorization of compress_files
fixed key-error on missing demultiplex metrics
Merge pull request #245 from b97pla/develop

fixed key-error on missing demultiplex metrics
added compression task to multitask/task
Merge pull request #247 from b97pla/develop

added compression task to multitask/task
Merge branch 'develop' of https://github.com/SciLifeLab/bcbb into develop