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/Network/SessionInfo.h

@@ -113,7 +113,7 @@ public:
 
 	FriendSessionInfo()
 	{
-		displayLabel = NULL;
+		displayLabel = nullptr;
 		displayLabelLength = 0;
 		displayLabelViewableStartIndex = 0;
 		hasPartyMember = false;
@@ -121,7 +121,7 @@ public:
 
 	~FriendSessionInfo()
 	{
-		if (displayLabel != NULL)
+		if (displayLabel != nullptr)
 			delete displayLabel;
 	}
 };