Compatible ship classifications with the API

[gardejo]

Ship classifications (and abbreviations) would be better off match itself with the API.

This will enable us to follow the game updates.

cf. The specification of api_stype is:

api_id	api_sortno	api_name
1	1	"海防艦"
2	2	"駆逐艦"
3	3	"軽巡洋艦"
4	4	"重雷装巡洋艦"
5	5	"重巡洋艦"
6	6	"航空巡洋艦"
7	7	"軽空母"
8	8	"戦艦"
9	9	"戦艦"
10	10	"航空戦艦"
11	11	"正規空母"
12	12	"超弩級戦艦"
13	13	"潜水艦"
14	14	"潜水空母"
15	15	"補給艦"
16	16	"水上機母艦"
17	17	"揚陸艦"
18	18	"装甲空母"
19	19	"工作艦"
20	20	"潜水母艦"