Build a framework for a maintainable combat plugin

* Uses a hierarchy of WeaponClasses -> Weapons for performing attacks,
  with WeaponClass having a set of styles and associated Attacks for
  those styles. Weapons and their classes are built with an easy to use
  and clean DSL.

* Adds a BonusContainer mixin, so that Equipment, Weapons, and
  WeaponClasses can all have their own set of bonuses which apply to the
  player.

* Allows attacks to be queued to the Mobs CombatState instance from
  external code, allowing e.g., NPCs or auto-cast to queue attacks to be
  executed.

data/plugins/combat/weapons/scimitars.rb

@@ -0,0 +1,50 @@
+SCIMITAR_WIDGET_ID      = 81
+SCIMITAR_SPECIAL_BAR_ID = 21
+
+create_weapon_class :scimitar, widget: SCIMITAR_WIDGET_ID do
+  default_speed 4
+  special_bar SCIMITAR_SPECIAL_BAR_ID
+
+  attack_bonuses crush: -2
+  defence_bonuses slash: -1
+
+  add_style :accurate, attack_type: :slash, animation: 390
+  add_style :aggressive, attack_type: :slash, animation: 390
+  add_style :alt_aggressive, attack_type: :stab, animation: 391
+  add_style :defensive, attack_type: :slash, animation: 390
+end
+
+create_weapon :iron_scimitar do
+  attack_bonuses stab: 2, slash: 10
+  other_bonuses melee_strength: 9
+end
+
+create_weapon :steel_scimitar do
+  attack_bonuses stab: 3, slash: 15
+  other_bonuses melee_strength: 14
+end
+
+create_weapon /(black|white) scimitar/ do
+  attack_bonuses stab: 4, slash: 19
+  other_bonuses melee_strength: 14
+end
+
+create_weapon :mithril_scimitar do
+  attack_bonuses stab: 5, slash: 21
+  other_bonuses melee_strength: 20
+end
+
+create_weapon :adamant_scimitar do
+  attack_bonuses stab: 6, slash: 29
+  other_bonuses melee_strength: 28
+end
+
+create_weapon :rune_scimitar do
+  attack_bonuses stab: 7, slash: 45
+  other_bonuses melee_strength: 44
+end
+
+create_weapon :dragon_scimitar do
+  attack_bonuses :stab => 8, slash: 67
+  other_bonuses melee_strength: 66
+end