Added core section to calculate start end positions if user has not given them (i.e. wrath to run in whole chromosome). It runs after "get barcodes" step and with no dependencies, so allows for only some steps of the script to run even if user has not given start/end positions. More details of issue in https://github.com/annaorteu/wrath/issues/15
Added core section to calculate start end positions if user has not given them (i.e. wrath to run in whole chromosome). It runs after "get barcodes" step and with no dependencies, so allows for only some steps of the script to run even if user has not given start/end positions. More details of issue in https://github.com/annaorteu/wrath/issues/15