Contract 7.1.4

The clan tools after the Elixir Gym's fourth run on them (feedback #236-#243).

• The capture-gap note on clans_standings and clans_participation measures the response's own window, and says nothing on an empty one; it had measured the last seven days on every window (#236).
• clans_standings and clans_participation name members who joined during the window with the battles they played before joining, and say the rows are today's members (#237).
• clans_timeline with no window is the last 30 game days, echoed as source default; the whole-history default was refused on size (#239). season on the clan series shipped in 7.1.3 (#238).
• clans_members_timeline serves truncated, and member_count is described as the rows on the page (#240).
• clans_roster recent_events is the newest twenty by when they happened, and says when it was cut and where to read the rest (#241).
• clans_timeline says where the clan's donation counter exceeds its member rows in a week a member left: the game keeps the departed member's donations in the counter (#242).

Additive; clans_timeline's default window changes from all history to 30 game days.