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/VillageFeature.cpp

@@ -82,7 +82,7 @@ bool VillageFeature::isFeatureChunk(int x, int z,bool bIsSuperflat)
 
 		bool forcePlacement = false;
 		LevelGenerationOptions *levelGenOptions = app.getLevelGenerationOptions();
-		if( levelGenOptions != NULL )
+		if( levelGenOptions != nullptr )
 		{
 			forcePlacement = levelGenOptions->isFeatureChunk(x,z,eFeature_Village);
 		}
@@ -134,7 +134,7 @@ VillageFeature::VillageStart::VillageStart(Level *level, Random *random, int chu
 		// prioritize roads
 		if (pendingRoads->empty())
 		{
-			int pos = random->nextInt((int)pendingHouses->size());
+			int pos = random->nextInt(static_cast<int>(pendingHouses->size()));
             auto it = pendingHouses->begin() + pos;
             StructurePiece *structurePiece = *it;
 			pendingHouses->erase(it);
@@ -142,7 +142,7 @@ VillageFeature::VillageStart::VillageStart(Level *level, Random *random, int chu
 		}
 		else
 		{
-			int pos = random->nextInt((int)pendingRoads->size());
+			int pos = random->nextInt(static_cast<int>(pendingRoads->size()));
             auto it = pendingRoads->begin() + pos;
             StructurePiece *structurePiece = *it;
 			pendingRoads->erase(it);