Add SPLASH folder to SD Card

sdcard/SPLASH/README.txt

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+Splash screen images files must be 24-bit BMP files of size 240x304 or 240x300 pixels.
+The current splash screen image is the one stored in the root directory of the SD card
+and named "splash.bmp".  Images stored in the SPLASH folder can be made the current
+splash image by clicking on the BMP file in File Manager to view it, and then pressing
+the Right button (this will cause the file to be copied to the root folder and renamed
+"splash.bmp", overwriting any existing "splash.bmp" file in that location).  In order
+for the current splash screen to appear at power up, the "Show splash screen" option
+must also be enabled under Settings->UserInterface.
+
+For more information on Splash Screens, see the following Wiki pages:
+	https://github.com/eried/portapack-mayhem/wiki/Create-a-custom-splash-screen
+	https://github.com/eried/portapack-mayhem/wiki/File-manager
+
+Many additional Mayhem splash screens that users have shared online may be found in
+the Mayhem #splash-screens channel on Discord.