added (require 'workgroups-pickel) to workgroups-commands.el
- added (require 'workgroups-utils-basic) to workgroups-advice.el
- small changes of docstrings
added (require 'workgroups-functions) to workgroups-advice.el
added (require 'workgroups-utils-basic) to workgroups-functions.el
added some "requires"