Make gametype struct and organize gametype data

src/deh_lua.c

src/deh_soc.c

src/doomstat.h

src/g_game.c

src/g_game.h

src/hu_stuff.c

src/lua_baselib.c

src/m_cond.c

src/m_menu.c

src/netcode/d_netcmd.c

src/netcode/server_connection.c

src/p_setup.c

src/y_inter.c