Add the pico8 binary

pico8/readme_linux.txt

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+
+:: PICO-8 Linux Builds
+
+	On many linux distributions, PICO-8 will run out of the box (just unzip and run pico8), but it does
+	require wget to perform BBS downloads. To make sure wget is installed:
+
+	$ sudo apt-get install wget
+
+
+	You may need to ensure the pico8 file is executable:
+
+	$ sudo chmod +x pico8
+
+	
+	There are two different builds in this archive:
+
+		pico8      // statically linked sdl2
+		pico8_dyn  // dynamically linked sdl2
+
+
+	pico8_dyn can be used if you would like to provide your own sdl2, or to use the sdl2 built for your distribution:
+
+	$ sudo apt-get install libsdl2-dev
+
+
+
+:: Video Configuration
+
+
+	By default, PICO-8 runs fullscreen using OpenGL to blit (via SDL2). A software blitter can be used instead:
+
+	$ pico8 -software_blit 1
+
+	Alt+Enter can be used to toggle fullscreen, or the -windowed switch can be used to start up in in a window:
+
+	$ pico8 -windowed 1
+
+	There are several methods for blitting to fullscreen:
+
+	$ pico8 -fullscreen_method 0    // Maximized Window (default)       // SDL_WINDOW_SHOWN | SDL_WINDOW_BORDERLESS | SDL_WINDOW_MAXIMIZED | SDL_WINDOW_INPUT_GRABBED;
+	$ pico8 -fullscreen_method 1    // Borderless Desktop-sized window  // SDL_WINDOW_FULLSCREEN_DESKTOP
+	$ pico8 -fullscreen_method 2    // Hardware Fullscreen (erratic behaviour under some drivers)
+
+	0 and 1 are very similar, but might behave differently on some distributions. 2 is normally not recommended or needed.
+
+	These options can also be set in ~/.lexaloffle/pico-8/config.txt, which is generated when PICO-8 closes.
+
+
+
+