refactor!: overhaul package structure

[skaldarnar]

Organizes everything in this module under the namespace org.terasology.module.health. Sub-packages are used to organize the elements of the ECS, namely:

src/main/java/
└── org
    └── terasology
        └── module
            └── health
                ├── components
                │   ├── BlockDamagedComponent.java
                │   ├── DamageResistComponent.java
                │   ├── DamageSoundComponent.java
                │   ├── HealthComponent.java
                │   └── RegenComponent.java
                ├── events
                │   ├── ActivateRegenEvent.java
                │   ├── BeforeDamagedEvent.java
                │   ├── BeforeRestoreEvent.java
                │   ├── ChangeMaxHealthEvent.java
                │   ├── DeactivateRegenEvent.java
                │   ├── DoDamageEvent.java
                │   ├── DoRestoreEvent.java
                │   ├── HealthChangedEvent.java
                │   ├── MaxHealthChangedEvent.java
                │   ├── OnDamagedEvent.java
                │   ├── OnFullyHealedEvent.java
                │   ├── OnRestoredEvent.java
                │   └── RestoreFullHealthEvent.java
                ├── systems
                │   ├── BlockDamageAuthoritySystem.java
                │   ├── BlockDamageRenderer.java
                │   ├── DamageAuthoritySystem.java
                │   ├── HealthAuthoritySystem.java
                │   ├── HealthClientSystem.java
                │   ├── HealthCommands.java
                │   ├── RegenAuthoritySystem.java
                │   └── RestorationAuthoritySystem.java
                └── ui
                    ├── DirectionalDamageOverlay.java
                    ├── HealthHud.java
                    └── TimingInformation.java

This little script should help you get all the branches checked out locally:

git -C modules/Health fetch
git -C modules/Health checkout refactor/pkg-structure
for m in AdditionalRails AdventureAssets AlterationEffects Anatomy Behaviors Breathing ClimateConditions CombatSystem CoreSampleGameplay DamagingBlocks Equipment Explosives FallingBlocks FunnyBlocks GooeyDefence GooeysQuests GooKeeper Hunger Inferno IRLCorp ItemPipes LightAndShadow Lost ManualLabor MasterOfOreon MetalRenegades MobileBlocks MultiBlock PhysicalStats Potions Projectile Rails Sample Scenario Thirst WoodAndStone WorldlyTooltip; do
    git -C modules/$m fetch
    git -C modules/$m checkout refactor/adjust-for-health
done 

BREAKING CHANGE: moving and renaming packages is incompatible for all modules depending on Health. Therefore, bumping version to 2.0.0-SNAPSHOT

Resolves #71

[skaldarnar]

Module Overhaul - Health