--- /dev/null
+Handle Activities within a project like projects are handled from "root":
+ Separate hash-ID directory for each activity
+ Separate info-file with optional meta-data per activiy
+ Separate tracking-file per activity.
+ Activities stored as sub-directories of related project
+ Keep track of current and last activity
+
+Change functions/subs that handle projects currently to be
+generic, and take PROJECT id as optional argument, following
+the logic: if an argument is passed, the function should
+operate on an activity, if no argument is passed, on project.
+
+Fix code so start = stop->start can work
+Make sure stop stops current activity, if any
+Allow activities to toggle (activity = main->activity)
+
+Be naive: assume that tracking files are consistent :)
+Maybe: get inspiration from ti: read until last line, and regex new info onto it :)
+