ENH: added 'max' mode to extract_label_time_course
added comment to pass statement (line 2560)
added to max mode to what's new. Added test
moved feature addon to bottom of file and added link. Formatted doc string
Merge pull request #1128 from MadsJensen/ECH_add_max_opt_gen_extract_label_time_course

ENH: added 'max' mode to extract_label_time_course