Modernize project codebase (#906)

* 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

* Add safety checks and fix a issue with vector going OOR

Minecraft.Client/PS3/SPU_Tasks/ChunkUpdate/SignTile_SPU.h

@@ -16,7 +16,7 @@ public:
 	}
 
 	Icon_SPU *getTexture(int face, int data){	return TileRef_SPU(wood_Id)->getTexture(face);	}
-	void updateShape(ChunkRebuildData *level, int x, int y, int z, int forceData = -1, TileEntity* forceEntity = NULL)	// 4J added forceData, forceEntity param
+	void updateShape(ChunkRebuildData *level, int x, int y, int z, int forceData = -1, TileEntity* forceEntity = nullptr)	// 4J added forceData, forceEntity param
 	{
 		if (onGround()) return;
 		int face = level->getData(x, y, z);