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/FenceTile_SPU.cpp

@@ -59,7 +59,7 @@ bool FenceTile_SPU::connectsTo(ChunkRebuildData *level, int x, int y, int z)
         return true;
     }
     TileRef_SPU tileInstance(tile);
-    if (tileInstance.getPtr() != NULL)
+    if (tileInstance.getPtr() != nullptr)
 	{
         if (tileInstance->getMaterial()->isSolidBlocking() && tileInstance->isCubeShaped())
 		{