Beta 0.4.0

Breaking

• Component save-data inside EPF_EntitySaveData is now stored differently. Was previously a map. Direct interaction with it needs to be refactored. Consider using EPF_ComponentSaveDataGetter<T> to access individual save-data components.
• EPF_PersistenceComponent::ForceSelfSpawn() is now OverrideSelfSpawn(bool selfSpawn) to allow override in both ways. #13

Additions

• Added a persistence-specific query builder that offers a shortcut to querying specific components of an entity.
• Added an option to regenerate the navmesh on spawn #17

Changes

• The type discriminator used in JSON serialization has been unified to be _type. Old save-data is however backwards compatible.

Fixes

• Fixed some GUIDs not being lowercase
• Fixed #11