New spellhandler system

[Razfury]

Implement a new spell system for the core.

• [x] Stage 1: Add new system.

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• [ ] Stage 2: Change over exisiting spells from classes to the new platform
• [x] Warrior
• [ ] Paladin
• [ ] Shaman
• [ ] Warlock
• [ ] Mage
• [ ] Hunter
• [ ] Death Knight
• [ ] Priest
• [ ] Druid
• [ ] Rogue

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• [ ] Stage 3: Any remaining spells that need it
  • [ ] Misc/Generic

[Razfury]

Stage 1 has been completed 27.11.2018

[Razfury]

picture from warrior