cwsub: Player substitution descriptor

cwsub extracts information about in-game player substitutions. It is designed to be used in conjunction with cwevent to mitigate a blind spot in the existing tools.

cwsub outputs up to ten pieces of information about each substitution. All are included by default; which ones are generated is controlled by the -f switch.

cwevent standard field numbers

Field number	Description	Header
0	Game ID	GAME_ID
1	Inning	INN_CT
2	Batting team	BAT_HOME_ID
3	Substitute	SUB_ID
4	Team	SUB_HOME_ID
5	Lineup position	SUB_LINEUP_ID
6	Fielding position	SUB_FLD_CD
7	Removed player	REMOVED_ID
8	Position of removed player	REMOVED_FLD_CD
9	Event number	EVENT_ID