converting visual c++ to c++.
- godMode is added.
- unlimited live is added.
- power up is added.
Ubuntu/Debian:
$ apt install cmake libsdl2-dev libsdl2-image-2.0-0-dev libsdl2-mixer-2.0-0
$ make build run
# or
$ mkdir build
$ cd build
$ cmake ..
$ make
$ ./uMario