Release 0.19.0

Summary

Rules: Aligned scoring and game end with Tenhou's rules: renhou and kiriage mangan are off, and the all-last dealer ends the game when first with the winning score threshold (agariyame and tenpaiyame), with a repeat taking priority over the threshold in the extension rounds.
Payments: Pao now covers the whole hand, stacked yakuman included. In a double ron the honba bonus goes only to the winner closest to the discarder.
Kan: A kan is allowed with one live tile left in the wall, and a replacement tile drawn as the wall empties is rinshan, never haitei. Deferred kan dora is revealed at the replacement discard, so a ron on that discard counts it and its ura.
Game client: A double right-click no longer discards the next draw after answering a call. Phone side melds stay on the board by closing the gaps between them, and the top badge holds a bot's whole name.
Infrastructure: A deploy now refuses to start while the game server has a started or pending game.
Docs: The ruleset states what Ronin does, spells out how final points are rounded, and drops an unsourced claim about JPML karaten.

bug: make pao cover the whole hand, stacked yakuman included (7cf0577)
bug: reveal deferred kan dora before ron on the replacement discard (22d6a8e)
bug: pay double ron honba only to the winner closest to the discarder (a848079)
bug: allow kan with one live tile left in the wall (fb2b7f3)
bug: disable renhou and keep one rules profile (29eccea)
bug: score 4 han 30 fu exactly, without kiriage mangan (374f2cf)
bug: stop a double right-click from also discarding the next draw (4d9935d)
bug: keep phone side melds on the board and bot names on the top badge (efabb77)

Code changes (lock files and SVG assets excluded): 67 files changed, 839 insertions(+), 323 deletions(-)