Add status bar

[FrenkelS]

We can't draw the whole 320x200 screen with Commander Keen gameplay action without rewriting the whole engine. Instead use the space that's left on screen with a new status bar containing the same information as the score box and/or the status window.

[FrenkelS]

And Commander Keen's face, just like Wolfenstein 3D, Doom and Quake :)

[FrenkelS]

Look at the Commander Keen 7 Tech Demo to see what a Commander Keen status bar can look like: https://vimeo.com/148926335