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/DLC/DLCLocalisationFile.h

@@ -12,7 +12,7 @@ public:
 	DLCLocalisationFile(const wstring &path);
 	DLCLocalisationFile(PBYTE pbData, DWORD dwBytes); // when we load in a texture pack details file from TMS++
 
-	virtual void addData(PBYTE pbData, DWORD dwBytes);
+    void addData(PBYTE pbData, DWORD dwBytes) override;
 
 	StringTable *getStringTable() { return m_strings; }
 };