Enhancement to return entered_at to attendance

[kenwalker]

Fixes #310

Added entered_at to attendance call results. Also fixed a typo which was preventing Attendance_Id from being returned in player attendance record.

Park getAttendance now

Event getAttendance now

Player getAttendance now

[jrtaylor-com]

@kenwalker I missed this but will get it into the next release later this week or next

[kenwalker]

Cheers @jrtaylor-com