optimize fk search query, write global get_json
update docs & version, v1.10.0
fix dbfield, widget
rm unnecessary code
optimize ManyToMany field, rm checkinput, rm unnecesary code
update docs & version, v1.11.0
add unique switch, try-except to distinct, if not implemented, use Python (slow)
add unique=true to filter query
add hasmark+id to all not unoque lists, values
fix documentation & update version, v1.11.1
update readme