[~CLEANUP] Replaced before_import with import_before and after_import with import_after
[-CLEANUP] Removed old unused code
[+FEAT] Added events process_before and process_after
[~CLEANUP] Set profile on mapper less often
[+BUGFIX] Set intermediate csv column names if there is only a storeview value
[~BUGFIX] Move downloader after checking if profile exists to prevent unclear errors
[+FEAT] Add check if helper method exists when in mapper
[+DOCS] Added section about store-view specific configuration
[+DOCS] Added example of category import with multiple store view values