command: add field-dominance property
TOOLS/lua: add autodeint.lua

This isn't quite as robust as idet.sh as the default detection
interval is only 4 seconds vs 35 for idet.sh. idet.sh can have such a
large sample time since it turns off the vo and uses --untimed, which
is currently not possible from lua.
TOOLS/lua: remove tabs from some lua scripts
TOOLS/lua: update README.md