Added a link to the contribution guidelines.
Monk: display Crane's Zeal on Blackout Kick (Stance of the Spirited Crane).
Monk data tidying.
hunter: display Beast Cleave on Multishot.

Fixes https://github.com/Adirelle/AdiButtonAuras/issues/76.
Tidied hunter spells (order and comments).
Warlock: updated Immolate, Incinerate, Conflagrate and Backdraft (including (Fire and Brimstone versions).

Fixes https://github.com/Adirelle/AdiButtonAuras/issues/75.