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/Common/GameRules/StartFeature.cpp

@@ -47,7 +47,7 @@ void StartFeature::addAttribute(const wstring &attributeName, const wstring &att
 	else if(attributeName.compare(L"feature") == 0)
 	{
 		int value = _fromString<int>(attributeValue);
-		m_feature = (StructureFeature::EFeatureTypes)value;
+		m_feature = static_cast<StructureFeature::EFeatureTypes>(value);
 		app.DebugPrintf("StartFeature: Adding parameter feature=%d\n",m_feature);
 	}
 	else
@@ -58,6 +58,6 @@ void StartFeature::addAttribute(const wstring &attributeName, const wstring &att
 
 bool StartFeature::isFeatureChunk(int chunkX, int chunkZ, StructureFeature::EFeatureTypes feature, int *orientation)
 {
-	if(orientation != NULL) *orientation = m_orientation;
+	if(orientation != nullptr) *orientation = m_orientation;
 	return chunkX == m_chunkX && chunkZ == m_chunkZ && feature == m_feature;
 }