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/Windows64/Windows64_App.h

@@ -25,9 +25,9 @@ public:
 	virtual int GetLocalTMSFileIndex(WCHAR *wchTMSFile,bool bFilenameIncludesExtension,eFileExtensionType eEXT=eFileExtensionType_PNG);
 
 	// BANNED LEVEL LIST
-	virtual void ReadBannedList(int iPad, eTMSAction action=(eTMSAction)0, bool bCallback=false) {}
+	virtual void ReadBannedList(int iPad, eTMSAction action=static_cast<eTMSAction>(0), bool bCallback=false) {}
 
-	C4JStringTable *GetStringTable()																									{ return NULL;}
+	C4JStringTable *GetStringTable()																									{ return nullptr;}
 
 	// original code
 	virtual void TemporaryCreateGameStart();