Update for Diretide 2020
InputManager
Game
ConVarManager
			
			- Added F5 Reload Hotkey
 - Added F6 Unload Hotkey
 - Added class ConVarManager
 - Removed class ConVar
 
InputManager
- Removed event WndProc
 - Added event WindowProc
 
Game
- Removed ConVar GetConVar(string name)
 
ConVarManager
- Added int GetInt32(string name)
 - Added float GetSingle(string name)
 - Added bool GetBoolean(string name)
 - Added string GetString(string name)
 - Added void SetValue(string name, int value)
 - Added void SetValue(string name, float value)
 - Added void SetValue(string name, bool value)
 - Added void SetValue(string name, string value)