Removed obsolete plugins. Started hotkeys port. Mostly-finished
position port. Corrected dwarfmonitor date display. Documented
putontable.lua in readme.
replaced magic numbers in dfstatus script with `df.item_type.TOKEN`;
added dfstatus to readme and init_example; myself to contributors list,
updated needs_porting notes and removed script
The new dfstatus script needs some work on magic numbers before it moves
to the scripts folder; the notes file contains my notes on further
things to delete.