* add "fastdwarf 2" to use DF builtin "turbo speed" debug setting
* use Units::isCitizen() instead of race/civ check
* only scan active units, not all of them
* do both fastdwarf and teledwarf in the same loop
* teledwarf: don't use MapCache - it's faster to do it directly
* teledwarf: don't clear both occupancy flags - check unit 'prone' flag
* teledwarf: set proper unit occupancy flag at destination tile
* teledwarf: if destination tile has standing unit, make dwarf lie down
* cleanup 'fastdwarf' command
* improve help text
This is an incompatible change to the plugin ABI.
The Console is not thread-safe unless used indirectly
via color_ostream_proxy, so everything should use their
per-thread stream.