Adds new wall sprites, cleans up existing ones, adds to test map #212

Icon difference rendering

Please file any issues here.

Icons with diff:

MODIFIED - icons/turf/walls/clockwork_wall.dmi (0)

State Name (duplicate)	Old Icon	New Icon	Status
3-2			Modified
75-2			Modified
11-2			Modified
23-8			Modified
3-8			Modified
2-8			Modified
55-2			Modified
203-2			Modified
38-2			Modified
139-4			Modified
6-2			Modified
23-2			Modified
75-4			Modified
38-8			Modified
10-2			Modified
6-8			Modified
74-4			Modified
11-4			Modified
3-4			Modified
203-4			Modified
7-8			Modified
10-4			Modified
39-8			Modified
139-2			Modified
2-4			Modified
7-2			Modified
55-8			Modified
74-2			Modified
39-2			Modified
2-2			Modified

MODIFIED - icons/turf/walls/icerock_wall.dmi (0)

State Name (duplicate)	Old Icon	New Icon	Status
157-2			Modified
3-8			Modified
3-2			Modified
8-8			Modified
11-4			Modified
21-4			Modified
5-4			Modified
39-2			Modified
74-4			Modified
141-4			Modified
29-2			Modified
4-4			Modified
6-2			Modified
4-2			Modified
7-8			Modified
9-2			Modified
137-2			Modified
6-8			Modified
5-2			Modified
74-2			Modified
75-4			Modified
10-2			Modified
2-2			Modified
13-2			Modified
29-8			Modified
11-2			Modified
141-8			Modified
38-2			Modified
137-8			Modified
141-2			Modified
203-4			Modified
8-2			Modified
9-8			Modified
203-2			Modified
13-8			Modified
2-8			Modified
23-8			Modified
13-4			Modified
7-2			Modified
157-8			Modified
12-8			Modified
139-4			Modified
10-4			Modified
23-2			Modified
157-4			Modified
12-4			Modified
3-4			Modified
38-8			Modified
29-4			Modified
39-8			Modified
2-4			Modified
75-2			Modified
21-2			Modified
12-2			Modified
55-8			Modified
139-2			Modified
55-2			Modified

MODIFIED - icons/turf/walls/plasma_wall.dmi (0)

State Name (duplicate)	Old Icon	New Icon	Status
39-2			Modified
39-8			Modified
10-2			Modified
38-8			Modified
74-2			Modified
55-2			Modified
55-8			Modified
139-2			Modified
75-2			Modified
2-2			Modified
38-2			Modified
6-2			Modified
11-2			Modified
3-8			Modified
10-4			Modified
203-2			Modified
74-4			Modified
203-4			Modified
2-4			Modified
11-4			Modified
2-8			Modified
7-8			Modified
139-4			Modified
75-4			Modified
3-4			Modified
6-8			Modified
23-8			Modified
23-2			Modified
3-2			Modified
7-2			Modified

MODIFIED - icons/turf/walls/hotel_door.dmi (0)

State Name (duplicate)	Old Icon	New Icon	Status
223-2			Modified
38-2			Modified
139-4			Modified
79-8			Modified
39-2			Modified
6-2			Modified
111-2			Modified
95-8			Modified
139-2			Modified
55-8			Modified
23-8			Modified
7-2			Modified
203-4			Modified
2-4			Modified
203-8			Modified
11-4			Modified
75-4			Modified
75-8			Modified
79-2			Modified
75-2			Modified
74-4			Modified
78-2			Modified
3-2			Modified
203-2			Modified
10-2			Modified
207-2			Modified
2-2			Modified
78-8			Modified
111-8			Modified
127-8			Modified
207-8			Modified
255-8			Modified
55-2			Modified
74-2			Modified
239-2			Modified
2-8			Modified
74-8			Modified
38-8			Modified
23-2			Modified
11-2			Modified
7-8			Modified
95-2			Modified
223-8			Modified
10-4			Modified
239-8			Modified
3-4			Modified
3-8			Modified
6-8			Modified
39-8			Modified
255-2			Modified
110-8			Modified
127-2			Modified
110-2			Modified