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/UI/UIControl_Progress.cpp

@@ -53,7 +53,7 @@ void UIControl_Progress::setProgress(int current)
 {
 	m_current = current;
 
-	float percent = (float)((m_current-m_min))/(m_max-m_min);
+	float percent = static_cast<float>((m_current - m_min))/(m_max-m_min);
 
 	if(percent != m_lastPercent)
 	{