Project modernization (#630)

* Fixed boats falling and a TP glitch #266

* Replaced every C-style cast with C++ ones

* Replaced every C-style cast with C++ ones

* Fixed boats falling and a TP glitch #266

* Updated NULL to nullptr and fixing some type issues

* Modernized and fixed a few bugs

- Replaced most instances of `NULL` with `nullptr`.
- Replaced most `shared_ptr(new ...)` with `make_shared`.
- Removed the `nullptr` macro as it was interfering with the actual nullptr keyword in some instances.

* Fixing more conflicts

* Replace int loops with size_t and start work on overrides

Minecraft.World/EnchantmentTableEntity.cpp

@@ -46,12 +46,12 @@ void EnchantmentTableEntity::tick()
 	oRot = rot;
 
 	shared_ptr<Player> player = level->getNearestPlayer(x + 0.5f, y + 0.5f, z + 0.5f, 3);
-	if (player != NULL)
+	if (player != nullptr)
 	{
 		double xd = player->x - (x + 0.5f);
 		double zd = player->z - (z + 0.5f);
 
-		tRot = (float) atan2(zd, xd);
+		tRot = static_cast<float>(atan2(zd, xd));
 
 		open += 0.1f;
 
@@ -124,7 +124,7 @@ void EnchantmentTableEntity::setCustomName(const wstring &name)
 
 shared_ptr<TileEntity> EnchantmentTableEntity::clone()
 {
-	shared_ptr<EnchantmentTableEntity> result = shared_ptr<EnchantmentTableEntity>( new EnchantmentTableEntity() );
+	shared_ptr<EnchantmentTableEntity> result = std::make_shared<EnchantmentTableEntity>();
 	TileEntity::clone(result);
 
 	result->time = time;