TODO: Achievements

[heyitsbench]

No description provided.

[heyitsbench]

Realm first level 80 achievements look to be easily done in achievement.dbc, whereas the know thy enemy achievement needs modifying in achievement_criteria.dbc. If there are any other achievements that need adjustment/adding, please let me know. Otherwise, should be committed today.

Also of note, if #7 happens, then this will need to be reopened to add the exploration achievements for the respective zones.

[heyitsbench]

Looks like Let It Snow, Fistful of Love, Check Your Head, and Shake Your Bunny-Maker are also achievements requiring changes. Ugh.

EDIT: In keeping with my pseudo-blizzlike stance, apparently Fistful of Love and Let It Snow don't require changes, as their criteria was not changed in any way for Cata. ¯\(ツ)/¯

[heyitsbench]

Closed with 649f086 and 9b9e377. Hallow's End masks will need to be made for those achievements, but that'll be horrible so I don't want to yet.