major refactor of Client and Server

this refactor includes changes to TClient:

- all member fields are now public, but protected with Sync (an alias
  for boost::synchronized_value
- removed all (now) obsolete getters and setters

changes to TServer and TNetwork:

- thread-safe ID generation, previously it was possible for there to be
  ID duplicates. this is now solved by moving id generation and
  assignment into the same mutex locked context.
- deprecated ForEachClientWeak and replaced some usages of it with
  ForEachClient, getting rid of the weak_ptr shit in most places
- implemented a bunch of new functions for getting rid of more weak_ptr
  everywhere

include/TLuaEngine.h

@@ -220,6 +220,8 @@ private:
         // Debug functions, slow
         std::queue<std::pair<TLuaChunk, std::shared_ptr<TLuaResult>>> Debug_GetStateExecuteQueue();
         std::vector<TLuaEngine::QueuedFunction> Debug_GetStateFunctionQueue();
+        
+        sol::table Lua_JsonDecode(const std::string& str);
 
     private:
         sol::table Lua_TriggerGlobalEvent(const std::string& EventName, sol::variadic_args EventArgs);
@@ -230,7 +232,6 @@ private:
         sol::table Lua_GetPlayerVehicles(int ID);
         std::pair<sol::table, std::string> Lua_GetPositionRaw(int PID, int VID);
         sol::table Lua_HttpCreateConnection(const std::string& host, uint16_t port);
-        sol::table Lua_JsonDecode(const std::string& str);
         int Lua_GetPlayerIDByName(const std::string& Name);
         sol::table Lua_FS_ListFiles(const std::string& Path);
         sol::table Lua_FS_ListDirectories(const std::string& Path);