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/TakeFlowerGoal.cpp

@@ -53,12 +53,12 @@ bool TakeFlowerGoal::canUse()
 
 bool TakeFlowerGoal::canContinueToUse()
 {
-	return golem.lock() != NULL && golem.lock()->getOfferFlowerTick() > 0;
+	return golem.lock() != nullptr && golem.lock()->getOfferFlowerTick() > 0;
 }
 
 void TakeFlowerGoal::start()
 {
-	pickupTick = villager->getRandom()->nextInt((int) (OfferFlowerGoal::OFFER_TICKS * 0.8));
+	pickupTick = villager->getRandom()->nextInt(static_cast<int>(OfferFlowerGoal::OFFER_TICKS * 0.8));
 	takeFlower = false;
 	golem.lock()->getNavigation()->stop();
 }