New naval and ground units for improving gameplay & historical accuracy

Naval (Idea not unique to me)

- A "carrier" boat: can embark an X amount of troops and transfer them over the water. Purpose is to have something to speed up movement of troops over water, compensated by increased vulnerability of the troops (so, a weak but quick unit that can transfer other ground units over water)

e. g. At factory level one, for 5k iron and 4k oil, a player can build a tanker-like boat with speed of 42 (double speed of regular transport ships). Attack and defence are only 10, making it vulnerable to other naval troops.

+ will help players in "the great war" map who are playing as America/in other maps, where transfer over oceans is necessary

+ will make light cruisers more useful, for they will be the only units capable of catching up to these transport ships

+ make naval combat more important/diverse

Ground

- changing lighter tank's air damage from 3 to 15

(lighter tanks are significantly inferior to regular tanks, and at nearly the same cost, are overlooked by most players. However, increasing their air defence capability will not only make them a necessary part of any army, but also force players to have a diverse army of planes, heavy tanks and smaller tanks, cerating a "rock-paper-scissors" balance)

- a new troop unit: flamethrower troops. They were used in WW1 by both sides, although they were less practical and more of a phychological weapons.

This new unit will be weak (historically accurate, flamethrower-carrying troops were "marked men"; carrying explosive gas didn't help either), however, able to inflict large damage to other ground units.

This will also give a new purpose to gas resource, which is currently only used to build balloons and aerodromes