import_person: avoid some php warnings, show progress
new player form: clean up php warnings
new person: autocomplete from unregistered persons list
new player: finish autocomplete functionality
new person: not allowed to leave status null
scoreboard: do not show "unregistered" players
list_roster.inc: do not include "unregistered" players
contest form: eliminate some php warnings
contest form: eliminate php warnings
list_roster.inc: do not look for player in the url
pairings: eliminate php warnings