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/PerformanceTimer.cpp

@@ -7,7 +7,7 @@ PerformanceTimer::PerformanceTimer()
 	// Get the frequency of the timer
 	LARGE_INTEGER qwTicksPerSec;
 	QueryPerformanceFrequency( &qwTicksPerSec );
-	m_fSecsPerTick = 1.0f / (float)qwTicksPerSec.QuadPart;
+	m_fSecsPerTick = 1.0f / static_cast<float>(qwTicksPerSec.QuadPart);
 	
 	Reset();
 #endif
@@ -28,7 +28,7 @@ void PerformanceTimer::PrintElapsedTime(const wstring &description)
 	QueryPerformanceCounter( &qwNewTime );
 
 	qwDeltaTime.QuadPart = qwNewTime.QuadPart - m_qwStartTime.QuadPart;
-	float fElapsedTime = m_fSecsPerTick * ((FLOAT)(qwDeltaTime.QuadPart));
+	float fElapsedTime = m_fSecsPerTick * static_cast<FLOAT>(qwDeltaTime.QuadPart);
 
 	app.DebugPrintf("TIMER: %ls: Elapsed time %f\n", description.c_str(), fElapsedTime);
 #endif