Tibiawikisql

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- ``Item.attribute_dict`` returns empty dictionary instead of ``None`` if ``Item.attributes`` is empty.

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- Charms are now read from their TibiaWiki articles instead of a static json file.
- ``Charm`` class and ``charm`` table changes:
- Added ``article_id``, ``title``, ``timestamp`` and ``version``
- Renamed ``description`` to ``effect``.
- New ``creature_sound`` and ``item_sound``, containing "sounds" made by creatures and items respectively.
- ``Creature`` class and ``creature`` table changes:
- Added ``push_objects``.
- Added ``sounds`` to class.
- ``Quest`` class and ``quest`` table changes:
- Added ``rookgaard``, ``type``, ``quest_log``, ``active_time`` and ``estimated_time``.
- ``Item`` class and ``item``table changes:
- Added ``marketable``, ``pickupable``, ``light_color`` and ``light_radius``,
- Added ``sounds`` to class.
- New tracked attributes in ``item_attribute``
- ``destructible``
- ``holds_liquid``
- ``writeable``
- ``rewriteable``
- ``consumable``
- ``writable_chars``

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- New table ``mount``, containing all mounts and their information.
- Fixed incorrect potions entries due to NPC Minzy.

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- Fixed physical and earth modifiers not showing up in ``weak_to``, ``immune_to`` and ``resistant_to`` ``Creature`` properties.
- Fixed incorrect ``weak_to`` property.
- Fixed missing ``modifier_hpdrain`` ``Creature`` attribute.

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- `elemental_attack` Item Attribute split into ``fire_attack``, ``ice_attack``, ``energy_attack`` and ``earth_attack`` to
reflect changes in TibiaWiki's template.
- Added ``bestiary_kills`` and ``charm_points`` properties to ``Creature``.
- Added ``elemental_modifiers``, ``weak_to``, ``immune_to`` and ``resistant_to`` properties to ``Creature``.
- New table ``world`` and model ``World``. Contains information of Game worlds, including now offline worlds.

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- Elemental protection and required vocation item attributes were not getting set.