MCHeli Rework 1.1.0-beta.1

Phase 5 of the road to 1.1.0: the groundwork that content packs, older Minecraft versions and
the vehicle workshop build on. Betas are not uploaded to CurseForge; download them from the GitHub
releases. Worlds from 1.0.0 load with their vehicles and items.

Added

• /mcheli shows where the vehicles were loaded from and how many there are; /mcheli list [helicopter|plane|tank|vehicle] lists them.
• /mcheli give <players> <vehicle> [count] for operators, with the vehicle names suggested.
• /mcheli reload for operators: reads the vehicle and weapon definitions again without
  restarting. Vehicles already in the world switch to the new values on the spot and keep their
  ammunition; models and textures edited on disk show up straight away, without F3 + T.
• Server config, serverconfig/mcheli-server.toml in each world: whether explosions break blocks
  and start fires, a damage multiplier for vehicles, infinite ammunition, and a list of vehicles
  that cannot be placed. Edits apply while the server runs.
• Boats destroyed on the water (by a torpedo or anything else) cook off: three explosions with
  fireballs within about five seconds, the first from the fuel, the second from the ammunition
  still aboard, the last and biggest sized by the fuel load like a crash. Then the burning wreck
  slowly goes under, stern first and listing, and settles on the bottom.
• Content can now bring textures, models and sounds while the game runs, without a resource
  reload. Nothing uses this yet beyond /mcheli reload; content packs (beta.2) will.

Changed

• Vehicle items: there is now one item per vehicle kind (Helicopter, Plane, Tank, Ground Vehicle)
  that remembers which vehicle it places, instead of one item per vehicle. They look and are named
  as before. Items from 1.0.0 still work and turn into the new ones as soon as they are in a
  player's inventory; items in chests change when taken out. To give one by command, use
  /mcheli give (plain /give mcheli:ah-64 no longer exists for new items).
• The imported content is converted again on the first start, since the crafting recipes now
  make the new items. This takes a few seconds, once.
• The source is split into a version-free common module and a module per Minecraft version
  (forge-26.3 for now), and a release attaches one jar per Minecraft version. Nothing changes for
  players.

Fixed

• Boats and other floating vehicles sat about a third of a block too deep, so the Zodiac was
  almost under water. They now float as high as in the original.
• Static launchers and guns that turn with the gunner's view, such as the Type 93 and Mk 32
  torpedo tubes, only fired straight ahead. They fire where the gunner looks again.
• On Windows, converting the content again could fail with "access denied" when another program
  had the old mcheli/imported folder open, leaving the game without vehicles until the next
  start. The old folder is now moved aside first, and the swap is retried.