Still trying to make parser work

Start on messages parser

- Start protocol parser implementation - Small fixes

Refactor modules layout

- Use netbuf buffers for client connection stream - Read data from client

Refactor code to add more structure to it

Start server implementation in rust

Adopt some patches from OpenBSD port

updates to polish translation by alzen, also add two unlocalised string he found in the gui

Add a buffer for files opened with physfs for reading, fixes slow engine start

svg source for the bat animation update

fix of offsets and size to prior commits

code changes to make the new bat animation work

nicer hog bat animation art

aaand italian

aaand put in an exclamation mark

lowercase hedgehog, duplicate comment to description

Only registered players regain their teams on rejoin

Fix official server build

surfboard object for beach theme

Source svg for the sandcastle

requested by CopherNeue - make "flatten-flakes" only exclude the foreground layers. testing on eyes/halloween seems ok.

Enable beach theme install

Beach theme, completely redone