testing, let's try -Os optimisation for frontend and engine; small cleanup and typos

Take koda's notice into account, also update list of source files

add -O2

It seems there's no need to copy gear's msg. Fixes bots getting stuck after hog switch.

Experiment in eliminating transparent white from LandPixels - I think it messes up on some graphics cards. Noticed a curious white border on a girder in a theme Randy is working on. At the very least it is slightly more efficient in the blit.

Italian update

Little tweak to reduce noob fail. Delay drill rocket explosion by 250ms after spawn in Attack. Unless you drop it straight down w/ no power, it should not explode immediately in your face.

Remove density adjustment in ammoshove. Means a mine and a barrel will be batted same distance again.

Experiment. Applying density to both ammoshove and explosion, w/ distance of a hedgehog knock being standard value (/3 since hedgehog "density" is 3)

added SetAmmoStore to lua for convinience

added 'loaded locale' message, other minor things

finally hook the engine localization on ios

GCI task: iOS _languages_ 2 (Bulgarian)

[GCI] backz task: unify the back button functionality, avoid using the save button

make sure to stop music before freeing it

enable lua to also set rope length percent