This patch is a follow-up to D3287/rP24604.
* Currently, there are eight attack technologies available at the forge: infantry/cavalry melee/ranged town/city. This patch merges the cavalry and infantry technologies to have technologies affecting all soldiers, as was already done for resistance, making the situation simpler and more flexible (e.g. if camels
* Elephants are excluded from the melee technologies, because of their very high base damage.
* The damage increases are reduced from 20% to 15%, making them still a bit better than their resistance counterparts.
* The melee attack technologies cost only food and metal (cf. hack resistance technologies) and the ranged attack technologies cost only wood and metal (cf. pierce resistance technologies).
* Their total costs have been reduced.
* The town phase technologies stay at 40 s each, the city phase technologies go to 60 s (also for resistance technologies).
* New names and descriptions for the ranged attack technologies.
Initial patch by @borg-, rebased and updated by @Nescio.