Implement these traps

[TheBlackfish]

Traps to be implemented -

• [x] Ballista
• [ ] Caltrops
• [x] Proximity Mine
• [x] Radio Nest
• [ ] Rocket Nest
• [ ] Block
• [ ] Flare
• [ ] Standard Banner

[TheBlackfish]

Each player only gets to build one of the available traps each game on a cooldown. The player list will have tool and cooldown listed.

[TheBlackfish]

Cooldowns should not just be tied to turns, as then flagging tiles would count.

Only DIGGING lowers a player's cooldown!

[TheBlackfish]

Ballista - Fires in a straight line at an enemy within range, wrecking it. Proximity Mine - If a tank moves within range, blows up everything in that radius. Rocket Nest - If a tank moves within range, blows up mostly everything in a forward cone. Radio Nest - Flags all mines within a tiny range. Caltrops - Destorys a tank that goes over the tile.

[TheBlackfish]

Block - Tanks must move around the trap.

[TheBlackfish]

Flare - After X turns, three friendly tanks are spawned.

[TheBlackfish]

Proximity Mine, plus all trap logic, implemented in commit #83.

[TheBlackfish]

Radio Nest added as of commit #90.

Each turn, the nest places a flag on a nearby mine. When all nearby mines are flagged, the nest is destroyed.

[TheBlackfish]

Standard Banner - Any wrecks nearby become friendly tanks. AKA tankromancy.

[TheBlackfish]

Ballista added as of commit #95.