Rework docs to include mention of post-tasks
Rework docs to include mention of post-tasks

kejbaly2/invoke,frol/invoke,kejbaly2/invoke,frol/invoke,mattrobenolt/invoke,sophacles/invoke,pyinvoke/invoke,mkusz/invoke,tyewang/invoke,singingwolfboy/invoke,pfmoore/invoke,mattrobenolt/invoke,mkusz/invoke,pyinvoke/invoke,pfmoore/invoke