Currently ranged troops have the following attack ranges:
```
b , a , e , c , h
infantry javelineer: 24 , 28 , 32 , 28 , 32
cavalry javelineer : 28 , 32 , 36 , 32 , 36
infantry slinger : 48 , 52 , 56
infantry archer : 72 , 76 , 80 , 76 , 80
cavalry archer : 72 , 76 , 80 , 76 , 80
elephant archer : 72 , 76 , 80
```
It doesn't make much sense cavalry javelineers have more range than their infantry counterparts, or that elite troops have more range than champions.
This patch removes those range differences and unifies them to a simpler:
```
30: javelineers
50: slingers
60: crossbowmen
70: archers
80: archers with archery tradition
```
See also D2886494, D2886, D3246, D3246D3314.
[EDIT] While at it, this patch also gives arrow-shooting structures (i.ee.g. centres, fortresses, towers) the same maximum attack range as archers (i.e. 70), for consistency.