Add achievements

[tdauth]

• https://en.wikipedia.org/wiki/Achievement_(video_games)
• https://www.wowhead.com/achievements#

No savecode since it has to be achieved in a fresh game for now. XP alone as reward is useless when your heroes all have level 75.

Rewards:

• XP
• gold
• lumber
• items

Achievements:

• Boss Killer: Killed a boss of every type (reset when new bosses are added).
• Good Equipment: Carried every type of legendary artifact once (reset when new legendary artifacts are added).
• Failed Duel: You kill or get killed from another hero and the other hero died as well.
• Greedy: Collected 500 000 gold and lumber.
• Lucky Bastard: Won 5 times in a row at the Wheel of Fortune.
• Master Crafter: Crafted every item of every profession once.
• Master Warlord: Upgraded Tier 3 of every race once.
• 10 Boss kills.
• 10 hero kills in a row
• 10 town halls
• ...

[tdauth]

Done.