creeper pvp tweaks

## 0.2.0 (alpha)
- 70+ bots, including the newest SPSA-tuned bots (sp3_final, sp2_final) and new bow-fix bots
- New menu: recommended bots, random bot by strength (Easy to Perfect), Options and Info
- Hub: three kits (New kit, Custom kit 1, Custom kit 2) with use / save / reset buttons, and a barrel refill button
- Fights use the kit you picked; going back to the hub gives your kit again
- `/hub` command
- Arena: no world border, 520x520 full reset, a bigger area resets every round
- Options: creeper hit cooldown 0-5, natural regeneration on/off
- Bots wall up with blocks when their shield breaks or they're stuck in a crater
- Bots craft sandstone from sand when they run out of blocks
- Bots drop a half-built cannon when they pearl away
- Fixed: rounds sometimes didn't end after a kill
- Fixed: settings carried over from one bot to the next
- Fixed: empty ender pearl barrel
- Hunger and saturation now work like vanilla
- All text in English