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.Client/PS3/SPU_Tasks/ChunkUpdate/PistonExtensionTile_SPU.h

@@ -6,7 +6,7 @@ class PistonExtensionTile_SPU : public Tile_SPU
 
 public:
 	PistonExtensionTile_SPU(int id) : Tile_SPU(id) {}
-	virtual Icon_SPU *getTexture(int face, int data) { return NULL; }
+	virtual Icon_SPU *getTexture(int face, int data) { return nullptr; }
     virtual int getRenderShape() { return SHAPE_PISTON_EXTENSION; }
     virtual bool isSolidRender(bool isServerLevel = false) { return false; }
 //    virtual void updateShape(LevelSource *level, int x, int y, int z, int forceData = -1, shared_ptr<TileEntity> forceEntity = shared_ptr<TileEntity>());	// 4J added forceData, forceEntity param