divide print_to_console in print_command and print_error
make console available from toolchain
replace LuaStack with lua_State* in LuaEnvironment
rename init and shutdown with create and destroy in LuaEnvironment
remove lua_State in LuaEnvironment constructor
rename create and destroy in start and stop
include init,frame,shutdown in LuaEnvironment
remove Game
implement Lua chunks in LuaEnvironment