Frontlib: Work on the callback mechanisms for IPC Work commit; It compiles and runs but will need a major overhaul tomorrow.

After experimenting with a long running average at maxed out FPS and a variety of map sizes, 128 seems to actually be a good size to use if only drawing bits of world with stuff in it. 64 actually did even better in some situations, but significantly worse in others (lots of land, zoomed out).

frontlib refactoring socket.h now completely wraps all the lowlevel neworking, so it would be easy to switch away from SDL_net if needed. Also reduced global state by making an IPC connection an object-like thing.

Only create textures for non-empty LandPixel chunks. This should save a fair amount of memory, especially on smaller maps, and eliminate a number of draws

Merge

warp sound when AI survival hog respawns. attempt at a bit of a crate spawn animation (moar sparkles and a quick fadein)

Android: added a callback to java to determine dpi/dip how much we should scale the ui

Merge

add onGameTick20 to basic training, extend laser sight out way more (it was visible at top when completely zoomed out), move call of new turn to after AfterSwitchHedgehog to avoid lua issues in onNewTurn - if this causes problems, lua can do delayed actions in onGameTick

Some brainfucking code which greatly reduces number of TestCollision* calls in hedgehog walk routine. Especially helpful to AI optimization. Also fixes some edge cases.