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_SaveList.cpp

@@ -52,7 +52,7 @@ void UIControl_SaveList::addItem(const string &label, const wstring &iconName, i
 
 	IggyStringUTF8 stringVal;
 	stringVal.string = (char*)label.c_str();
-	stringVal.length = (S32)label.length();
+	stringVal.length = static_cast<S32>(label.length());
 	value[0].type = IGGY_DATATYPE_string_UTF8;
 	value[0].string8 = stringVal;
 
@@ -74,7 +74,7 @@ void UIControl_SaveList::addItem(const wstring &label, const wstring &iconName,
 
 	IggyStringUTF16 stringVal;
 	stringVal.string = (IggyUTF16*)label.c_str();
-	stringVal.length = (S32)label.length();
+	stringVal.length = static_cast<S32>(label.length());
 	value[0].type = IGGY_DATATYPE_string_UTF16;
 	value[0].string16 = stringVal;