Improvements to arenaresults3 renderer

[jonbinney]

arenaresults3 is intended to be the "super verbose but also very explicit" renderer. I've made two changes to it in this PR:

• for each player, summarize their results both as P1 and separately as P2
• show total results for each of those

Using this test command:

python deep_quoridor/src/play.py \
	-N 3 -W 0 -mx 40 \
	-t 10 \
	-i 34 \
	-r computationtimes arenaresults3 eloresults progressbar \
	--num-workers=0 \
	-p \
	simple:nick=s_numba,use_rust=false,max_depth=4,heuristic=1,discount_factor=1\
	simple:nick=s_rust,use_rust=true,max_depth=4,heuristic=1,discount_factor=1\
	greedy:p_random=0.5

The results now look like:

+----------------------------+------+--------+------+
| Matchup                    | Wins | Losses | Ties |
+----------------------------+------+--------+------+
| P1 greedy (p_random=0.5)   |      |        |      |
|   vs s_numba               | 0%   | 100%   | 0%   |
|   vs s_rust                | 0%   | 100%   | 0%   |
|   total                    | 0%   | 100%   | 0%   |
|                            |      |        |      |
| P2 greedy (p_random=0.5)   |      |        |      |
|   vs s_numba               | 60%  | 40%    | 0%   |
|   vs s_rust                | 60%  | 40%    | 0%   |
|   total                    | 60%  | 40%    | 0%   |
|                            |      |        |      |
| P1 s_numba                 |      |        |      |
|   vs greedy (p_random=0.5) | 40%  | 60%    | 0%   |
|   vs s_rust                | 0%   | 100%   | 0%   |
|   total                    | 20%  | 80%    | 0%   |
|                            |      |        |      |
| P2 s_numba                 |      |        |      |
|   vs greedy (p_random=0.5) | 100% | 0%     | 0%   |
|   vs s_rust                | 100% | 0%     | 0%   |
|   total                    | 100% | 0%     | 0%   |
|                            |      |        |      |
| P1 s_rust                  |      |        |      |
|   vs greedy (p_random=0.5) | 40%  | 60%    | 0%   |
|   vs s_numba               | 0%   | 100%   | 0%   |
|   total                    | 20%  | 80%    | 0%   |
|                            |      |        |      |
| P2 s_rust                  |      |        |      |
|   vs greedy (p_random=0.5) | 100% | 0%     | 0%   |
|   vs s_numba               | 100% | 0%     | 0%   |
|   total                    | 100% | 0%     | 0%   |
|                            |      |        |      |
+----------------------------+------+--------+------+

[alejandromarcu]

looks great, very easy to read the table!